This package includes everything you will need to maintain your Seachem Tidal 35 Power Filter for superior performance. Included in the package is the Seachem Tidal 35 Filter Replacement Foam (2 Pack), Seachem Stability 250 ml, Seachem Tidal 35 Filter Replacement Matrix 160 ml, Seachem Tidal 35 Filter Replacement Zeolite 125 ml, Seachem Tidal 35 Filter Replacement Matrix Carbon 90 ml, Seachem Tidal 35 Fine Replacement Polishing Pad (2 Pack), an Inland Seas Pump Cleaning Brush Set, and a MarineAndReef.com Aquarium Cleaning Towel.

The Zeolite binds ammonia and heavy metals to detoxify the water. It won't deplete calcium in saltwater, and it won't increase general hardness in freshwater, where ionic strength is low.

According to the Seachem Tidal 35 Manual: Seachem Matrix Carbon is a preferred option in almost any aquarium setup.

Only replace half of the Seachem Matrix Media at any time. Seed the Matrix (& Matrix Carbon) with the included Seachem Stability.

The Seachem Tidal 35 Filter Replacement Foam & Polishing Pads should be replaced when they no longer rinse clean or have visible signs of wear.

If your Tidal 35 Filter has become noisier over time, it may be because of the scale and limestone deposits on the impeller. The Inland Seas Cleaning Brush Set is for cleaning the impeller, impeller shaft & impeller well. Keeping your impeller clean will maximize pump performance.

As for the Cleaning Towel, every aquarist needs a durable, lint-free microfiber towel for wiping down the drips, streaks and spills around their aquarium.

Everything in this package is suitable for both saltwater and freshwater aquariums.