I took a turkey INJECTOR that looks like a big syringe that inject turkeys with flavor...cut the end off so it was hollow on the end instead of the side, put a peice of air tubing over that and then put a peice of riggid tubbuing inside that small peice of air tubing so I had a wand of sort that I can move around and spot feed things.....

Worked really good...........and was big enough for krill.

bilge pump float switch for auto top off.....
Playground sand....
Lime stone rock that I picked up from the park and washed for base rock