For those of you who use salifert PO4, does anyone have trouble getting a color. I believe I have at least some phosphates, but always shows clear.
Thanks
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Hanna check is better as it reads low range. I just switched over from Salifert to Hanna for PO4.
Hanna tends to go on super sale for Black Friday, gets it really close to the cost of the salifert. I too could never see the color change.
BRS, Marine Depot, even Amazon.Where do you find that during the sale and I'm guessing the Friday after Thanksgiving?
LolLast year I think they even kicked off the sales a week before thanksgiving. I also might be getting older and can't remember clearly anymore. It's one of the two.

