Thanks guy's
I think mine is a cardinalis. I have bought it about 1o years ago for a different tank. This one has a very different setting. 240 watt HQL light above a 90 gallon tank.
I struggle with green alg on the leaves. I have raised the CO2, NO3, PO4 and the trace elements.
So I hope it will does better now. I was not sure about the temp. For some reason I cant recall no I had change the temp from 78 to 76. I have it now on 77.
I know it grows a bit slower. In the old set up it did even slower. Now I think it will, grow a inch a week.
It was hard for me and mu wife to adjust to the EI way of thinking. But now I am convinced.
Greetings Dirk