I would ditch that for a seachem or salifert test kit. When dealing w/ PO4
the amounts are so small you want a very good quality test kit. Carbon will not help w/ PO4
or the cyano
at this point. Some quick advice from me would be to get about 15lbs more LR
, up your flow a bit-maybe add another MJ 900, and step up your clean up crew. Adding a small serpent star is a good addition to any clean up crew, and get a better PO4
test kit. FWIW
, snails generally don't eat cyano
. A few hermits may but it won't amount to much.