Beautiful gargs! I really like the way you set up the dual setups as well.
No, I once ran out of CGD on accident. None of my Rhacs would eat it. I'd never recommend using anything else besides the Repahsy CGD. The formula has been continually improved over the last 15 years, Allen knows what he is doing. Spend the money to get it in a decent quantity to last you for awhile. It stores for up to a year (I believe, maybe more or less) you can buy quite a bit in order to save tons of money and to insure that your animals are getting the right nutrients. Do yourself a favor and get some ASAP!