Quote:
Originally Posted by Beepster1353
i put all the old sand underneith some new argonite sand to create a dsb
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I suspect this is the problem. How much sand did you add on top? Your old sand had living things in there. If you covered it too much, then it would become anaerobic (as you want with a DSB) and you would have a good amount of die off. Definitely check your parameters.