Aquarium systems test kitr a new range of test kits from aquarium systems that accurately test your pondaquarium waterr water quality is an important part of pond and aquarium keeping one of the most crucial things to test in order to maintain optimum water quality is the ph levels ph levels indicate the ratio of alkalis and acids in the water and changes in these levels are commonr fish are very sensitive to ph and so regular monitoring is necessaryr range 4 10r keep out of reach of chil