Collette Posted October 9, 2021 Share Posted October 9, 2021 Every so often, these oddly-shaped little spots of white show up on the inside of the glass of my shrimp/betta tank. It doesn't seem to be causing any trouble to the animals, and usually the spots will just go away on their own and pop up somewhere else in a few weeks. Can anyone tell me what this is? 1 Link to comment Share on other sites More sharing options...
Guppysnail Posted October 9, 2021 Share Posted October 9, 2021 I get these in tanks with newer wood especially mopani. I’m not sure exactly what those are I suspect just a bacterial colony. They come and go in mine as well. After 6months to a year from the time I introduce the wood I never see them. They have never caused harm in my tanks. 2 1 Link to comment Share on other sites More sharing options...
Collette Posted October 9, 2021 Author Share Posted October 9, 2021 @Guppysnail Now that you mention it, I did add a small piece of mopani for the shrimps about a month and a half ago, and prior to that, it hadn't happened, so now the cause is found! Thank you for your help! 3 Link to comment Share on other sites More sharing options...
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