alan3513
Fish Crazy
I would like to keep Multi's but my water is very soft with PH around 7, and realise that they require hard water with a high PH. I have put Argos play sand in some of my other tanks but need to put crushed coral in these tanks as the Ph drops to around 6 if i don't. What other sand can i use that would be suitable and raise the PH ? I can't put anything in the filter as the ones i use in my fish hut are homemade sponge filters with nowhere for anything to go, thanks.