I got a mystery snail today and they don't sell any calcium at our store so how do i supply my snail with calcium? I would prefer a liquid that you just pour in the tank every once in a while rather than tums or human meds. And i cant spend like 50 dollars on a calcium skimmer so i just want like a 10 dollar bottle of stuff you pour in specifically for freshwater aquariums. Also will calcium have any negative effects on my albino cory catfish or female veiltale betta? Also will it affect ph or my cycle?