My tank has been up for 4 months. I just bought a new brand of calcium that came with another bottle to balance the alk
. I can't remember the name and I'm at work or I would check the bottle. I hope this will help it to spread. I've never tried this type of Calcium before so I thought I would try it out. I also got 2 more Maxijet 1200's. That gives me 4 powerheads for circulation.