I'm using the miracle grow 3 month feed soil mixes with a 3/1 ratio of perlite. With out the perlite last time my plants never ran Into a problem. Granted it was much cooler but a ph problem was nowhere to be found. I water with tap water and I made sure I would use the same spout I used for the other plants. For superstition reasons of course. The other thing I just thought is that I would water soon after filling the jug. Now I store the water In a bigger container for several days. I'm going to flush with fresh water today for sure. .