Join Date: Jan 2010
Location: near twin cities
egg shells as ferts
My vals and my swords are showing signs of potassium and calcium (i think) deficiency. They have pinholes and in the leaves which are curling in places, and also paleness.
Egg shells are good K and Ca ferts for terrestrials so i'm thinking of trying it in my tanks. I'm going to bake the shells to dry them out and crush them into a rough powder as i would for my land plants. I'm going try to get into the substrate as best i can and only use a small amount (1/2 or 1 teaspoon at the roots of affected plants) so as not to raise my pH and distress my fish.
Has anyone used crushed egg shells as ferts and found them to be helpful? (And yes i am cheap).