DSB question

[marie]

Take a small clump of the sand out and put into a container of bleach and water. If the clump breaks up into the original sand particles then it is bacteria or algae holding it together. If it stays in the original clump then you have calcium precipitating out for some reason

[daplatapus]

Originally Posted by marie

Take a small clump of the sand out and put into a container of bleach and water. If the clump breaks up into the original sand particles then it is bacteria or algae holding it together. If it stays in the original clump then you have calcium precipitating out for some reason

Hmmm, cool, I'll try that.
Thanks for all the responses so far.