Jealous on how you're s. repens is carpeting lol..
whats your lighting? PAR? sure ferts./ dosing of iron is what red plants need, but intense light keeps the red plants 'sunburned' if that makes any sense to yuh!
Enjoying the black substrate opposed to the white pool sand.
I am using a Nova Extreme 2xT5HO 78W. I'm not sure what the PAR rating is. For my understanding it put me in medium - high range. The reflectors aren't the best. I am already adding extra iron but I think it need extra lighting for to red to come out. Maybe a Finnex Ray 2.