Pond test kits are important because they are a tool you use to tell you just what is going on with your pond waters chemistary and as such should be used
However fresh water test kits can be used as waterbug says because they are in reality one and the same apart from KH GH tests not being sold with them.
In saying this Tetra and API are about the best kits money will buy having used both of them in the past but I use Tetra more than API.
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