Jcrizzo12 Posted September 27, 2021 Share Posted September 27, 2021 Just wanting to get some insight here, I have freshly cycled 29 gallon heavily planted tank and recently began testing GH and KH due to some issues with newly introduced Cardinal Tetras. Kh is around 4 degrees but testing GH from the tank is around 22 degrees which I believe is very hard category. I live in the Chicagoland area and testing GH straight from the tap gives me around 13 degree hardness. This being the case, starting to think Cardinals are not a good idea based on my parameters even with every other area (AM, Nitrites, etc) being well within reasonable ranges, and no option to introduce a RO system in my current place. But nonetheless, does dosing aquarium fertilizer increase the GH of water? Just wondering why there is a difference between tap and my tank generally. Sorry if this is a noobish question lol Link to comment Share on other sites More sharing options...
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