Filter selection
Aquarium Filtration
Aquarium filtration is about more than clear water. A good filter supports mechanical filtration for debris, biological filtration for ammonia control, and enough water movement to keep the tank stable without stressing fish or shrimp.
Use this hub to choose between sponge filters, hang-on-back filters, internal filters, and canister filters based on tank size, stocking level, noise sensitivity, and maintenance style.
Compare Filter Types
- Sponge filters for shrimp, fry, and gentle flow.
- Hang-on-back filters for beginner and community tanks.
- Canister filters for larger or heavily stocked aquariums.
- Filter media choices, cartridge alternatives, noise, and long-term cost.
Recommended Guides
Helpful Gear To Compare
- Hang-on-back filters, sponge filters, air pumps, pre-filter sponges, ceramic media, and reusable media options matched to the tank and maintenance routine.
FAQ
What type of aquarium filter is best?
The best filter depends on the tank. Sponge filters are excellent for shrimp and fry, hang-on-back filters are convenient for many beginner tanks, and canisters fit larger systems.
Should I replace filter cartridges every month?
Do not replace all biological media at once. Preserve established media or rinse reusable media in old tank water to protect beneficial bacteria.
Why did ammonia rise after changing the filter?
Replacing too much established media can remove beneficial bacteria. That can weaken the cycle and cause ammonia or nitrite to appear.