Thanks Canuck Grower. Good information...

And I was trying to remove the calcium is what I thought so the plant would not get stopped up with the white scale like what is left on the buckets...

Anyways, I am going to add it for sure...

Growth update: The babies are probably 3-4 inches tall. I have been raising the rock level though as they grow. They are almost all above the drip ring now. Soon I will start watering with the pumps and move them into the cab... Seems there is always a slow one...