Just about ready to throw in the towel grrr

[sphelps]

You do require a large skimmer with the zeo system, what kind are you using and what size is your system. Also have you been keeping up with the 10% weekly water changes?

Zeovit is a good system but you can't do it half ***, ineffective skimming will result in all kinds of bacteria blooms such as cyano. I would defiantly cut your dosing by half until you can figure out what is causing the bloom.