How to Set Up a Planted Betta Tank

A betta needs much of what any small planted tank needs, so this page does not repeat the general advice in the planted nano tank guide. It focuses on what is different for a betta: calm water, steady warmth, access to the surface, and a cautious approach to company.

What size tank does a betta need?

Sources do not agree on one number, so here is what each says:

Every source points the same way: more water is more stable. This guide plans for 5 gallons or more, which meets Aquarium Co-Op's minimum and PetMD's ideal range, and we do not recommend going smaller for a planted betta tank. A 5 to 10 gallon tank also gives plants room to grow without crowding the surface. Measure your tank and check its real volume with the aquarium volume calculator, since substrate and hardscape take up space.

Whatever the size, fit a lid. Aqueon and PetMD both warn that bettas jump.

Why plants suit a betta tank

Live plants suit bettas for a few reasons, though none of them replaces a filter and water changes.

• Cover. PetMD calls live plants ideal and says bettas need places to hide. Aqueon recommends plants and "some floating cover to make them feel at home."
• Places near the surface. Bettas have a labyrinth organ and breathe air at the surface, as both PetMD and Aqueon note. Broad leaves placed high in the tank, and floating plants, give a betta places to linger near the top. Whether your betta uses them varies by fish.
• A possible help with water quality. Growing plants take up nutrients from the water, and Tropica describes a new tank's first 90 days as a time to get plant growth, fish population, and filtration into balance. Treat any benefit as a bonus, not a reason to change water less often.

One caution follows from the labyrinth organ: PetMD advises giving bettas places to hide without overcrowding the surface, because they regularly breathe air from it. Keep part of the surface open at all times, especially once floaters start to spread.

Flow: keep it gentle

Long-finned bettas are poor swimmers in a current. Aquarium Co-Op says bettas have delicate fins and cannot swim in strong currents, and it recommends "a gentle sponge filter or smaller filter with an adjustable flow rate." PetMD likewise recommends low or adjustable flow and lists air-driven sponge filters, box filters, and very low flow filters as suitable options.

Aqueon notes that a betta can survive without a filter because it breathes air, but says a filter gives better water quality and less maintenance. In a planted tank you want that stability, so run one.

Practical options:

• A sponge filter on a small air pump. Gentle flow, simple to clean, and nothing for fins to catch on. If the bubbles push the betta around, an inline air valve (check whether your pump includes one) lets you turn the airflow down.
• A small filter with adjustable flow, turned to its lowest useful setting.
• Watch the fish. A betta that struggles to hold its position, or hides in one corner away from the outflow, is telling you the flow is too strong.

A pairing sized for a 5 to 10 gallon tank:

Hikari

Hikari Aquarium Solutions Bacto-Surge Sponge Filter (Mini)

Model: 96038

Best for

A nano, shrimp or betta tank up to 10 gallons that needs gentle filtration.

Skip this if

Your tank is larger than 10 gallons or you do not want to run an air pump.

Rated aquarium size

Up to 10 gal

Dimensions

1.77 in H x 2.17 in R

Foam

Polyether foam

Drive

Air-driven; air pump not included

Strengths

• Very small footprint for nano tanks
• Polyether foam, which Hikari says gives longer life
• Needs only an air pump and airline to run

Limitations

• Air pump not included
• Hikari publishes no flow rate or pore size

Check Price on Amazon ↗ (opens Amazon in a new tab)Specs checked 2026-10-06. Prices and availability are on Amazon.

Hikari rates the Bacto-Surge Mini for tanks up to 10 gallons, and lists nano tanks and tanks with slow-moving fish among its uses. It needs an air pump and airline, which are not included. Hikari says the sponge needs at least 30 days to reach peak performance, so set it up at the start of cycling rather than the week the betta arrives. Rinse it only in tank water. Skip it if your tank is larger than 10 gallons or you do not want to run an air pump.

hygger

hygger Mini Silent Air Pump (1.5 W)

Model: HG811

Best for

A desk-size betta or shrimp tank running one small sponge filter.

Skip this if

You need to run more than one sponge filter or a tank over 15 gallons.

Rated aquarium size

1-15 gal

Power

1.5 W

Airflow

420 mL/min

Drive

Piezoelectric ceramic plate (no motor)

Included

Air pump with power adapter, 0.9 in air stone, 3.6 ft silicone tube, double-sided sucker, manual

Strengths

• Motorless piezo design, which hygger says is very quiet
• 1.5 W power draw
• Tubing and air stone included

Limitations

• Low output; suits one small sponge only
• No check valve listed in the box

Check Price on Amazon ↗ (opens Amazon in a new tab)Specs checked 2026-10-06. Prices and availability are on Amazon.

hygger rates the HG811 for 1 to 15 gallons, with a power draw of 1.5 W and a piezoelectric plate instead of a motor, which hygger says makes it very quiet. Its low output suits one small sponge. hygger says the pump is not submersible and should sit above the water level, or you should add a check valve, and none is listed in the box. Skip it if you plan to run more than one sponge filter.

The sponge filters and air pumps guide compares more pairings by the makers' tank ratings.

Heating and stability

Bettas are tropical fish. The care sources give these temperatures:

Aim for a steady temperature inside the overlap of those ranges. PetMD recommends a heater even if your home stays warm, because temperature swings stress fish, and Aquarium Co-Op notes that typical room temperatures leave bettas sluggish and at risk of illness. Pick a heater whose maker rating covers your tank, and check it with a separate thermometer.

hygger

hygger Small Aquarium Betta Heater (25 W)

Model: HG031

Best for

A 5 to 10 gallon planted or shrimp tank where you want to set and read the temperature.

Skip this if

You want a heater with no external controller or cable clutter.

Wattage

25 W

Rated tank size

5-10 US gal

Temperature range

59-93 °F (15-34 °C)

Display

LED digital display, switchable °F/°C

Controller

External controller

Heater tube

2 mm thickened quartz glass

Protection

Dry-run and overheating protection; error code E1 when out of water

Memory

Retains settings after power loss

Water type

Fresh and marine

Strengths

• Adjustable 59-93 °F with a digital readout.
• External controller keeps adjustments out of the water.
• Remembers its setting after a power cut.

Limitations

• Quartz glass tube rather than a shatterproof shell.
• Controller box needs a place to sit outside the tank.

Check Price on Amazon ↗ (opens Amazon in a new tab)Specs checked 2026-10-06. Prices and availability are on Amazon.

hygger rates the 25 W HG031 for 5 to 10 gallon tanks. It adjusts from 59 to 93 °F, shows the temperature on an external controller, remembers its setting after a power cut, and shows an error code and stops heating if it is out of water. The heating tube is quartz glass rather than a shatterproof shell, and the controller box needs a spot outside the tank. Skip it if you want a heater with no external controller or cable clutter.

Tetra

Tetra HT Submersible Heater (HT10, 50 W)

Model: 26447

Best for

A beginner 5 or 10 gallon planted tank that just needs a steady 78 °F.

Skip this if

Your livestock needs a temperature other than 78 °F.

Wattage

50 W

Rated tank size

2-10 US gal

Temperature

Electronic thermostat keeps water at a constant 78 °F

Indicator

Red when heating, green on standby

Safety

Shuts off if an electrical short is detected

Strengths

• Fixed 78 °F, so there is nothing to set.
• Two-color light shows heating vs standby at a glance.

Limitations

• Temperature cannot be adjusted.
• Tetra's page does not list materials or warranty.

Check Price on Amazon ↗ (opens Amazon in a new tab)Specs checked 2026-10-06. Prices and availability are on Amazon.

Tetra rates the HT10 for 2 to 10 gallons, and its thermostat holds the water at 78 °F with no adjustment, which falls inside each care source's range above. A red light shows when it is heating and green when it is on standby, and Tetra says it shuts off if it detects an electrical short. Skip it if you want to choose your own temperature.

For tanks up to 20 gallons, or for other sizes, see aquarium heaters for planted tanks, which covers each heater's rating, including the very small heaters rated below this guide's 5 gallon starting point.

Plant picks for a betta tank

Choose undemanding plants that grow without injected CO2 and leave the surface partly open. All of these are covered in more depth in easy aquarium plants for beginners.

A few handling notes:

• Do not bury rhizomes. Tropica warns that Anubias and Java fern rhizomes tend to rot if covered. Attach them with the method in how to attach Anubias and Java fern. Tying Anubias to a piece of wood that reaches toward the surface puts its broad leaves where a betta can use them.
• Expect crypts to drop leaves at first. New crypts often lose leaves before regrowing; see why aquarium plants melt.
• Keep floaters in check. Tropica notes that Phyllanthus fluitans can grow quickly and soon block light from plants underneath. Thin floaters regularly so the betta keeps open surface and lower plants keep their light. The floating plants guide covers other species and ways to contain them, and why they must never be released outdoors.

Tankmates: default to caution

Keep this simple. Aquarium Co-Op says bettas are territorial and should not live with other bettas. Both Aquarium Co-Op and Aqueon say companions are possible only in larger tanks: Aquarium Co-Op gives at least 10 to 20 gallons for small tetras, rasboras, and corydoras, and Aqueon gives 15 gallons or more and advises avoiding male gouramis, fin-nippers, and very active fish. PetMD adds that individual bettas' personalities vary.

For the 5 to 10 gallon tanks this guide targets, the safe default is a betta on its own. If you later move to a larger tank, research each species first and have a backup plan in case your betta or the tankmates do not settle.

Setup order and cycling

1. Place the tank on a level, sturdy surface, out of direct sun and near an outlet.
2. Add substrate, sloped toward the back. How to choose aquarium substrate compares options; epiphytes such as Anubias and Java fern do not need any.
3. Place hardscape and attach Anubias and Java fern while everything is dry.
4. Fill partway with conditioned water, then plant crypts with tweezers and top up. Treat all tap water; see water conditioners for planted tanks.
5. Install the sponge filter, air pump, heater, and thermometer, then the light. Tropica suggests about 6 hours of light a day for the first two to three weeks, then 8 to 10 hours.
6. Add floaters once the tank is running.
7. Cycle the tank before the betta arrives. Aquarium cycling and water testing explains how to confirm ammonia and nitrite are being processed. Tropica suggests changing 25 to 50 percent of the water a couple of times a week for the first three to four weeks, and Hikari's 30-day figure for its sponge is a reminder that filters take time to mature. Let your test results decide, not the calendar.
8. Add the betta, acclimate it slowly, and close the lid.

Maintenance

Once the betta is in, a short routine keeps the tank steady.

• Daily: check the thermometer, look at the fish, and feed sparingly. Tropica names overfeeding as the most common cause of algae problems.
• Weekly: change part of the water with conditioned water at a matching temperature. PetMD gives 15 to 25 percent weekly, Aqueon gives 10 percent weekly or 25 percent every two weeks for filtered tanks, and Tropica suggests about 25 percent weekly for planted aquariums. Aqueon warns never to change all of a betta's water at once.
• Weekly or as needed: remove dead leaves promptly (Tropica notes their breakdown feeds algae), thin floaters, and top up evaporation.
• Monthly or when bubbling slows: squeeze the sponge gently in removed tank water, never tap water.

The maintenance checklist helps you track these tasks, and the planted tank maintenance routine explains them in more detail.

Common mistakes

• Going below the care sources' tank size and expecting a planted bowl to stay stable.
• Strong flow from an unadjustable filter.
• Skipping the heater because the room feels warm.
• Covering the whole surface with floaters.
• Adding the betta before the cycle finishes.
• Adding tankmates to a small tank, or keeping two bettas together.
• No lid on a tank with a fish that jumps.

Next steps

• Compare heaters by rated tank size in aquarium heaters for planted tanks.
• Pair a sponge and pump with sponge filters and air pumps.
• Browse more small builds on the tank setups hub, or match light and plants with the setup finder.