Planted Aquarium Filters
Filtration keeps water clean and moves it through the plants, carrying CO2 and nutrients to the leaves. In a planted tank you want steady, gentle circulation everywhere, without blasting delicate stems.
What matters most
Size for your tank and stocking
Choose a filter rated for at least your tank's volume. Manufacturer flow figures are usually measured with an empty filter and no head height, so real-world flow is lower once media and plumbing are added.
Canister, hang-on-back, or sponge
Canister filters hide under the cabinet, hold lots of media, and work with clean glass inflow and outflow pipes, which is why they are popular with aquascapers. Hang-on-back filters are simpler and cheaper. Sponge filters are gentle and shrimp-safe but less tidy-looking.
Protect small livestock
Shrimp and fry can be pulled into intakes. A pre-filter sponge or fine intake guard is a cheap, worthwhile addition.
Plan maintenance access
Check that you can reach the filter, prime it, and clean it without draining half the cabinet. Easy maintenance is maintenance that actually happens.
Check before you buy
- Is the filter rated for your tank volume, with some headroom?
- Will it fit in or behind the cabinet, including hoses?
- Can you add an intake sponge for shrimp or small fish?
- Does the outflow create circulation across the whole tank?
Your current filter keeps the water clear, moves water gently through all of the plants, and is easy to maintain.
Ready to choose?
We have checked 10 filters options for identity, specifications, and fit. Compare them, with what each needs and who should skip it, here:
- Best Filters for Planted Tanks: Canisters and HOB Picks by Tank Size (2026) (buying guide)
- Fluval 307 Canister Filter Review (2026): Specs, Fit, and Upkeep (review)
- Fluval 307 vs Fluval FX2: Which Canister Filter Fits Your Tank Size? (comparison)
- Fluval 07 Series vs EHEIM Classic: Which Canister Filter Fits? (comparison)
