Cyano Killing off Chaeto

steiger33 · Jan 23, 2016

Can someone please help? I had a small outbreak of cyan in my sump where I have my chaeto. Well after about a week over 3/4 of my chaeto has died off or disappeared.
I added more from a friend of mine and skimmed the top to remove as much as I can but I don't know what else to do. I am running a Par 38 light over it. Should I add a rw4 in this section to get a little more flow?

Any help would be greatly appreciated. I will post pics shortly.

killingseed2000 · Jan 24, 2016

cut back the light time in the sump maybe. you could turn the light off for a couple days to help kill most of the cyno off.

steiger33 · Jan 24, 2016

killingseed2000 said:
cut back the light time in the sump maybe. you could turn the light off for a couple days to help kill most of the cyno off.

I forgot to mention I started the lights out yesterday. I turned them on to take these pics. Would you recommend adding the rw4 in there? It seems to have minimal flow. The chaeto does not tumble.