Fluval FX4 Canister Filter Angelfish It is a solid scarlet

It is a solid scarlet red

Replace approximately every 2 to 4 months based on bio-load and water clarity

Quarter-turn handle provides straightforward ON/OFF flow control

adjustment

After pH stabilizes

Fluval FX4 Canister Filter Angelfish It is a solid scarletFluval FX4 Canister Filter The Fluval FX4 Canister Filter is a high performance external aquarium filter for freshwater and saltwater aquariums up to 250 US gallons 1000 L. Designed as the mid size FX Series workhorse, the FX4 combines Smart Pump technology, self starting operation, strong mechanical capture, multi stage media capacity, and built in maintenance convenience for serious aquarium systems with higher filtration demands. FX4 High Output