Aquarium Filter Pads

FilterFirst is a dual-density filter pad designed to capture both larger debris and finer particles in one pad. ClassicBlue has a more open bonded construction for dependable mechanical filtration and strong water flow.

FilterFirst handles everyday mechanical filtration from larger debris down to finer particles. A Polishing Pad is much denser and is designed to capture extremely fine suspended particles for an extra-clear, polished-water appearance.

Yes. Water should pass through FilterFirst first so larger debris is removed before reaching the Polishing Pad. This helps prevent polishing media from clogging too quickly.

Incoming water should contact the softer, more open side first so larger particles are captured before water moves through the denser layer.

The soft side should face the incoming water. Water then passes through the denser portion of the pad for fine-particle filtration.

No. FilterFirst uses layered nonwoven construction rather than uniform micron-sized openings, so it does not have a true micron rating. Use a micron-rated Polishing Pad when you need a specific micron level.

A 50-micron pad is finer than a 100-micron pad and can capture smaller particles. Finer media may require more frequent cleaning.

Yes. Because polishing media is dense, flow can decrease as it loads with debris. Using regular mechanical filtration first helps it stay cleaner longer.

FilterFirst can often be gently rinsed to remove trapped debris and reused while it remains in good condition. Replace it if it becomes difficult to clean, begins breaking down or restricts flow.

There is no single schedule for every aquarium. Clean or replace media when it is heavily loaded with debris or begins restricting water flow.

Yes. Cut-to-fit filter media can be trimmed for many hang-on-back filters, canister filters, sumps and custom filtration systems.

Yes. Place it early in the filtration path so it removes debris before water reaches biological and chemical media.

Yes, as long as the pad is sized correctly and does not block flow. Make sure water passes through the media instead of around it.

A good general rule is coarse to fine: larger-debris mechanical filtration first, followed by finer mechanical or polishing media, then chemical media such as activated carbon when needed, and biological media where appropriate.

Not necessarily. Either can be used on its own depending on your filtration needs. Extra layers can reduce water flow, so more media is not always better.

No. FilterFirst is mechanical filtration. For odors, discoloration and certain dissolved substances, use activated carbon or another appropriate chemical filtration media.

Use a Carbon Filter Pad when you want chemical filtration to help with odors, discoloration or dissolved impurities. It can be used alongside regular mechanical filtration, but follow medication directions because activated carbon may remove some aquarium medications.

FilterFirst itself is mechanical filtration and generally does not need to be removed. Activated carbon may remove some medications, so follow the medication manufacturer’s instructions.

They can capture very fine suspended particles and some suspended algae, but recurring cloudy or green water may have an underlying cause that filtration alone will not solve.

It can. Beneficial bacteria live throughout the aquarium and on established biological media. Avoid replacing all established biological media at the same time whenever possible.

Watch for reduced flow, water bypassing the pad or a pad heavily loaded with debris. Replace it if cleaning no longer restores normal flow or the material begins to break down.

In many filters, yes. Remember that some cartridges also contain activated carbon or provide biological surface area, so the replacement setup still needs to provide the filtration types your aquarium requires.

Water bypass usually means the pad is clogged, too dense for the system’s flow rate, improperly fitted or stacked with too many restrictive layers.

No. Too many dense layers can reduce flow and cause bypass. Use enough media to do the job without choking the filter.

Use coarse media for larger debris, everyday fine mechanical media for typical suspended particles, and polishing media when you want to capture very fine haze or particles.