I don't think, this post will have been viewed as much in my journal, so have added it here for discussion.
So new filter running for a couple of days, only been using 2 of the 39w T5s
Upped the ferts to..
Macro: 4.6g KNO3, 0.8g KH2PO4, 6.8g MgSO4 - dosed three nights a week
0.5g trace in the...