DIY calcium dosing?
I've notice some of my plants new growth is curling, and from what I've read its probably because of a calcium deficiency. Is there any other way to dose it besides dry ferts? I know for shrimp they just wash an egg shell and toss it in there, but would that egg provide calcium to the water? Also read that snail shells slowly leach calcium, is thats true? If so would getting some assassin snail to free up some snail shells help? Or is none of this really enough and the only way is to just dose calcium?
I have a high lights, EI dosing, O+ root tabs, and DIY CO2 for a heavily planted dutch style 40b.