I'm still struggling with hard water, out of the tap is 7.2 ph, 25 kh and 80 GH. In the tank it's ph 8.4, GH 75 and kh 300! After changing out the sand, and heavy water changes I was afraid of loosing my fishless cycle so got some high tolerant platies (Only 5) ammonia is 0, nitrites 0, and nitrates under 20only! My plants aren't dying as quick as in the old sand. I will head out tomorrow to buy some peat moss, how much would you put in a 75gallon to not affect the platies to much? I have some driftwood on order, and I would still really like my neon tetras and similar species, community tank. before I realized the problem my cories and shrimp (in my 10 gallon died) can I fix the ratios... What do I do now?