My 90 gallon Tank was cycled for 5 weeks, started to stocking, at 4 months I had a bad cyano outbreak, phosphate and nitrates were low but registering, bi-weekly 20% water changes have been maintained. I started Dr. Tim's Refresh (every other day for a week), turning on the skimmer on the off days. About 50% of the cyano disappeared. I then switched to Dr. Tim's Waste Away(same schedule dose one day run the skimmer the next). After 2 days my Xenia looks like he is dying.... Is this caused by My dosing regiment or just the fact the phosphates and nitrates are now very close to zero
