Adjustable air pump for two sponge filters
An adjustable air pump for two sponge filters should provide two controllable outlets, enough pressure for your tank depth, and stable…
Setup & accessories
Help matching aquarium filters and pumps to tank size, bioload and noise tolerance.
Setup
Airline tubing and check valves for a sponge filter
A sponge filter needs a compatible air line, a properly oriented check valve, and an air pump matched to the tank. Here is what to buy and…
Surface skimmer add-on for a HOB
A surface skimmer can remove film and floating debris from the top of an aquarium while your HOB filter handles normal mechanical and…
Air pump for a sponge filter
An air pump powers a sponge filter by pushing air through an air stone or uplift tube. Choose a pump with enough airflow for the filter and…
Gang valve for multiple air stones
A gang valve lets one aquarium air pump supply several air stones or other air-driven accessories. Use this guide to choose the right…
How to prime a canister filter
Priming a canister filter means filling the housing and hoses with aquarium water so the pump can begin circulating. Follow the correct…
Spray bar versus duckbill output
A spray bar spreads filter flow across several openings; a duckbill sends it through one broad, directional outlet. Choose based on where…
Heater placement versus filter outflow
Place an aquarium heater where water circulates well—often near the filter outflow—so warmth can spread through the tank. Follow the…
How to Reduce HOB Waterfall Noise
Most HOB waterfall noise comes from water dropping too far onto the tank surface. Raise the aquarium water level first, then check for…
Where to place an air stone
Place an air stone where its rising bubbles help move water and gently disturb the surface without creating a current that stresses fish.
Choosing
Media
How Often to Rinse Aquarium Filter Media
Rinse aquarium filter media when debris restricts water flow—not on a rigid calendar. Use removed aquarium water for biological media,…
Cycling a New Filter With Used Media
Used filter media can help a new aquarium filter establish beneficial bacteria faster, but it does not guarantee an instant cycle. Keep the…
How to rinse sponge media in tank water
Rinse aquarium sponge media gently in a bucket of water removed during a water change. The goal is to remove excess debris without making…
Mechanical vs. Biological vs. Chemical Aquarium Filter Media
Mechanical media catches debris, biological media supports beneficial bacteria, and chemical media removes certain dissolved substances.…
Never Rinse Aquarium Filter Media in Tap Water
Untreated tap water can expose beneficial filter bacteria to chlorine or chloramine. Rinse reusable aquarium media in removed tank water or…
Should You Replace All Aquarium Filter Media at Once?
Replacing every type of filter media at once can remove much of the beneficial bacteria that processes fish waste. Replace media by type,…
How They Work
How an Aquarium Filter Works
Aquarium filters work by moving water through media that catches debris and supports beneficial bacteria. Some also use chemical media to…
How long to run a filter during a fish-in cycle
Keep the filter running 24 hours a day during a fish-in cycle and after it. Continuous flow helps supply oxygen to beneficial bacteria that…
Why a new tank is cloudy even with a good filter
Cloudy water in a new aquarium is often caused by a temporary bacterial bloom or fine substrate particles—not a failed filter. Identify the…