Jaredgib Posted September 20, 2016 Share Posted September 20, 2016 This stuff has recently shown up in my tank after switching to reef crystals. It's hard, can't be easily scraped off with brush or blown off with the baster. Snails ignore it. Seems to get "worse" daily. Sorry for the quality of the picture. Pulled a rock out and scrubbed with brush and some came off. My lights are on for 5 hours daily. Water temp ~78.5. Tank is two months. Variety of snails, 2 clowns & 1 cleaner shrimp Water parameters: No3--5ppm (Red Sea) No4--.03ppm (Salifert) No4--.04 (Hanna) Thanks Link to comment
BulkRate Posted October 3, 2016 Share Posted October 3, 2016 Looks like green coraline or some other base film type to me... harmless and just part of the aging/maturation process of live rock (or in this case base rock that's becoming live) As a check: Does it brush off with a toothbrush or sprout tiny hairlike growths? if yes, THEN it could be a pest algae. Link to comment
Jaredgib Posted October 3, 2016 Author Share Posted October 3, 2016 As a check: Does it brush off with a toothbrush or sprout tiny hairlike growths? if yes, THEN it could be a pest algae. Not with a toothbrush, I was able to brush it off with a stiffer brush. No hair like growths that I can tell. Thanks Link to comment
Boggers Posted October 3, 2016 Share Posted October 3, 2016 yup, start of coraline growth. Green is always the first color to appear. Link to comment
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