Fluval FX5 Filter Foam (x 3) - A228 10-20 including a reference sample for

including a reference sample for checking the accuracy of your results

Ensures optimal water flow due to bead-shaped components

Advanced: Create a stock solution by dissolving 20 grams (~5 teaspoons) of Alkalin8

Dosage guide: 1ml raises iodine by 0

Fluval FX5 Filter Foam (x 3) - A228 10-20 including a reference sample forFluval FX5 Filter Foam is designed for efficient mechanical filtration, capturing debris and solid waste before it reaches finer filter media. Each foam insert is shaped to fit perfectly within the FX5 media baskets, helping to prevent water by pass and maximise filtration effectiveness. The foams optimised pore structure supports strong water flow while resisting clogging, making it a reliable first stage in both freshwater and marine aquarium