The Planted Tank Forum - View Single Post - Potassium reference solution
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post #12 of (permalink) Old 07-14-2016, 05:03 PM
Solcielo lawrencia
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The service lines may be copper as there are 0.03mg/L of Cu which is 3x more than the Fe. There's also a lot of Na, Cl, sulfate in your water. Doing large WCs just replenishes these nutrients, not get rid of them. This is one problem with large water changes.

Ideally, K>Na. I don't know what effects K<Na has on plant health but it's detrimental to many crop plants. This is something I'll probably experiment on after I figure out the necessary micronutrient ratios necessary to keep a tank healthy. If you really want control, using distilled water may be your best option if you have a solar distiller, or an RO/DI unit to reduce the contaminants in the tap.

Last edited by Solcielo lawrencia; 07-14-2016 at 07:18 PM. Reason: Typo
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