Houdini Cyano algae - thoughts

[monocus]

check your phosphates and nitrates.cyano is naturally occurring in the ocean and is a form of phyto food

[Slyguy00]

I could be wrong but those look like dinos to me. http://en.m.wikipedia.org/wiki/Dinoflagellate. If thats what it is, I just finished fighting this stuff and its not fun. But my advice would be to syphon the hell outta the sand and do 80% WC for 3 days in a row. After that wait a day or two to see if you have beat it. Repeat if you still have signs of it. Thats what i did and it was gone in 4 days. Not to mention my tank has never looked better since i did. Just my opinion

[carriej]

Hi there,

I have been checking, and nitrates are currently reading 0 (even on the low scale) and phosphates are either 0-.25... The color is too close for me to tell. The tank is about 14 months old, 130 gallon tank with a 30 gallon sump, and a light biolode of only 7 small fish.

My biggest thing is it disappears! Is this normal for it to completely wipe itself out each day only to return? I was concerned it might be fluctuating alk, but each time I test alk it remains consistent at around 9dkh

[carriej]

I looked at dinos, and they seemed to look stringy. I could be wrong totally of course. This stuff is more like a slimey mat.

[Slyguy00]

Well if its cyano chemiclean works good but its only a temporary fix if your perameters are off. Either way id be doing a few large water changes.