I am looking for water soluble calcium. I have gypsum, but wondering if I am putting too much in my water and it is not dissolving. Ive seen people using 1/4tsp per gallon, but I find this not being enough, or its not staying dissolved in there. Using tap water, 2 air stones to keep solution mixing, and I put epsom salts in the reservoir too. Wondering if the 1/4 tsp is enough? I had a calcium deficiency on a couple plants and maybe it just wasnt enough to correct it. I would really like a water soluble calcium for ease of use if I can get one strong enough. Wondering what all my options are. I see a lot of suggestions to do the egg shell route, but I don't have enough egg shells to keep up with that I bet. Thanks.