2 Attachment(s)
scrubber tuning advice please
hi everyone
ive been running a diy waterfall scrubber on my 60 gallon reef setup for some time now but never seem to get green growth or any real hair algae yet nuisance algae persists in display tank ,not a large amount but still there
im somewhat confused why my scrubber wont out compete the dt tank algae as the scrubber is fairly high powered for my bio load ( feeding approx.between 0.5 - 1 cube daily ) and im also running a high end skimmer
the scrubber screen is 4.5" by 4.5" of growing area and is fed by the sump return pipe with flow being at the recommended rate for size of screen ( flow measured at the screen not by the pump rating )
its lit by 4 osram 660nm red leds each side running 700ma
now what im confused by is the growth on the screen always seems dark and a red kinda tint to it ,everything ive read says dark growth needs more light - but if I remove the diffusers that im using for example to increase light it basically burns the algae leaving burnt yellow in the screen holes
so im confused as to if I should be letting the algae grow longer or if what im getting is a dark slime that needs cleaning more often and if so how thoroughly
presently im running the scrubber lights for 15 hours on 9 off - should I increase or decrease lighting period ?
thanks for any helpAttachment 6029Attachment 6030