Re: Tank Update- My 90G Pile of Rocks
Time for an update...
Rather than going with biopellets, I decided to try vinegar dosing through a dosing pump and my apex controller. My goal is to add more nutrients to improve colouration in my sps.
I started very low 2mls a day and baseline levels of phosphate and nitrate were undetectable.
I also left my GFO and GAC online. My plan was to slowly increase the dose by 2mls every week until I observed cyano growth, then I would reduce the dose.
I slowly made attempts to increase the feedings in my tank.
Doubled daily feedings and increased coral feedings to three times a week.
Things were noticeable almost immediately with a clearer water column and skimmate was darker and smelled like

oop:
Slowly ramped things up to about 20mls a day over 2 months. Observations of a green type of algae with very small bubbles had begun to cover my live rock and sand bed in various places. It is easy to blow off with a turkey baster, so I assume that it is a type of bacterial algae like cyano. Also noticed bacterial film in my sump and filter socks. Tests have indicated undetectable levels of both phosphate and nitrate.
Here is a pic of some of the nasty unwanted algae...
My conclusion is that I had dosed too much vinegar, as a result of the cyano. My softies were not looking very good either. Colour in my sps had initially improved, then started to decline and lose their vibrancy.
My solution has been to lower my dosing to 7mls a day and reduce feedings slightly for the next few weeks.