dk77 Posted April 1, 2008 Report Share Posted April 1, 2008 (edited) Hey guys was wondering if anyone can tell me what kind of algae this is, or if it is even algae. Have been keeping fish for a long time and have never had a tank that gets purple algae like this one, don't get any green algae, just this purple stuff. Nitrates are kept fairly low (<20ppm), and all other parameters seem to be good. Is this stuff something I should be worried about? Thanks Edited April 1, 2008 by dk77 Quote Link to comment Share on other sites More sharing options...
Sam Chicklets Posted April 1, 2008 Report Share Posted April 1, 2008 It is most likely just a form of brown algae that looks purple due to the underlying color of the rocks. Quote Link to comment Share on other sites More sharing options...
Dalray Posted April 1, 2008 Report Share Posted April 1, 2008 looks to be a reaction from the minerals in the rock and the water in the tank, i had this in my old tank, but it was red. i could be wrong though. just my worthless 2 cents lol Quote Link to comment Share on other sites More sharing options...
Jilly McJillerson Posted April 1, 2008 Report Share Posted April 1, 2008 Did you get that rock from burnco? I got some similar looking slate from burnco and had the same looking algae the entire time it was in my tank. I dont know what it is, but it tended to accumulate it areas with high light. I ended rescaping my tank and took the rocks out, not really due to the algae, just went for a different look. Quote Link to comment Share on other sites More sharing options...
dk77 Posted April 1, 2008 Author Report Share Posted April 1, 2008 These rocks are from Burnco, and the algae does only seem to grow in high light areas. Don't think it is brown algae or a reaction as I get the same purple algae growing on my substrate and on the tank glass. Wierd, wonder what the hell is in those rocks? Quote Link to comment Share on other sites More sharing options...
Vallisneria Posted April 1, 2008 Report Share Posted April 1, 2008 I've found sometimes brown algae gets a purple tinge to it, especially when on similar grey rocks to yours. I've had "purple"/brown algae in my african tank which also has grey limestone rocks in it. Quote Link to comment Share on other sites More sharing options...
bigfishal Posted April 2, 2008 Report Share Posted April 2, 2008 I have the same kind of rocks in some of my tanks and the same thing purple algae grows on them to as well as some of the other different kinds of rocks that I have. Never seems to ever bother the fish at all though. But in one of my tanks I have a Chinese algae eater and he loves the stuff so much and ended up with purple lips looks pretty funny but he loves the stuff! Quote Link to comment Share on other sites More sharing options...
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