If so, what is your replacement rate?
I run some in my 10G in a HoB
(not ideal, but it's what I got) and I haven't changed it in about 4 months.
I'm just assuming for now that when Phosphate starts showing, I change it out.
I test PO4
levels maybe every other week or so using Saliferts kit.
It literally hasn't shown ANY colour (verified by my sister and mother (since women are better at this stuff)) and was wondering if I should be looking out for something else to be replacing it?
Apart from giving the bag a bit of a clean during maintenance, I haven't touched it.
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