I´m aware of the risk of cyano because my normal refugium produce some cyano in the upper layers now and then. What I´m going to test is high flow because I do not want to produce internal zero nutrient zones.
@chema What was your PO4 and NO3 concentrations when cyanobacteria took over?
Both of you - did you run the light 7/24 or reverse time period? Which flow rate?
Sincerely Lasse
Hi Lasse: by that time my PO4 concentration was between 0,1-0,2 and the nitrate between 10-15. I run reverse photoperiod. I don't recall the precise flow rate but I think it could be around 1000 l/h.
I did not have any ciano in the display nor sump, only in the reactor.