Hi Eric, sorry to hear about your goby, I think some strains of cyano can be toxic and might have led to his demise , high phosphates and iron can cause outbreaks and it tends to grow faster in warmer water , but higher alkalinity tends to discourage it, hope this helps and if it was easy where would the fun be, stay positive happy reefing, working and keeping a reef tank is pretty hard work

After you run chemiclean, you need to add good bacteria back in, or it will happen again. A good one is seed from aquavitro. I would also use it whenever you do a water change. I dont know what you dose for alk but kalk works wonders and can help raise ph which can also help with the algae not coming back.

Maybe some crabs can find that goby 😊. Good Luck 😊

Just watched your video on all for reef, are you still using it? Your sps coral growth is amazing