I've found a good distributor, but I have a few questions if anyone knows fertilizer.
The don't sell Potassium Sulphate, but they have Potassium Sulphate Solupotasse. Is that more or less the same thing? It has the same nutrition analysis, but is it safe for fish?
And they have two kids of potassium nitrate, potassium nitrate crystal and potassium nitrate special K. Anyone know which would be better for fish? If there is even a difference?
Sorry, their customer service wasn't very helpful.