PondMAX Algae Block

The PondMAX Algae Block effectively prevents most algae common to freshwater fish ponds. HOW TO USE DOSE RATE Add one 15g piece per 200L of water. DO NOT OVERDOSE INFORMATION Do not contaminate streams, rivers or waterways with the chemical or used containers. Do not use more than the recommended dose as fish and plants may be harmed or damaged. DO NOT use in ponds containing fish intended for human consumption