GHA is doing my head in and now I've got cyano making an appearance. I've been dosing 10ml of vibrant each week for 7 weeks now. It seems to stop it from growing for 4 days after each dose but the last two days it takes off again. I do weekly 15 gallon water changes with NSW. I do not run a skimmer (I'm starting to think I'm going to have to). I had a fuge but the Cheato just got over run with GHA and I removed it when I started vibrant. Cyano is now appearing on the rocks which I'm siphoning along with ripping out as much GHA when I do water changes. I have no GHA or cyano wherever my conch snails and sand sifter star can reach which unfortunately is only at or near ground level. I have filter socks that I change out every second day. I've increased flow since cyano appeared. I'm worried the rock I purchased from a fellow Reefer is full of phosphates.
Tank specs:
90 gal tank (60 display, 30 sump)
2 x SLW 20 Wave makers
Parameters (fairly stable)
P - 0.11 to 0.15
N - 4
Alk - 8
Cal - 450
Mg - 1320
PH - 8.2
Ive been throwing a bag of API phos zorb in the high flow area of the sump but no real difference to the figures. I don't have space for reactors etc. but could add a skimmer.
CUC is 5 trochus snails, short spine urchin, a few small hermits and two conch snails.
So my questions
Will a skimmer help with phosphate removal?
Should I continue with vibrant or go back to the fuge?
Can I add GFO in a bag or is this pointless?
Any other suggestions?
Tank specs:
90 gal tank (60 display, 30 sump)
2 x SLW 20 Wave makers
Parameters (fairly stable)
P - 0.11 to 0.15
N - 4
Alk - 8
Cal - 450
Mg - 1320
PH - 8.2
Ive been throwing a bag of API phos zorb in the high flow area of the sump but no real difference to the figures. I don't have space for reactors etc. but could add a skimmer.
CUC is 5 trochus snails, short spine urchin, a few small hermits and two conch snails.
So my questions
Will a skimmer help with phosphate removal?
Should I continue with vibrant or go back to the fuge?
Can I add GFO in a bag or is this pointless?
Any other suggestions?