The caulpera algae is grown to effectively remove excess nutrients that nuscience(sic) algaes need to survive....plus the caulperas help my system maintain zero nitrates(nitrates being a primary source of nutrition for caulperas). I either remove some and toss it...bag it up and return it to my favorite LFS for purchase credit...or feed some of it to my yellow tang/coral beauty/pygmy angel....it is in my opinon an outstanding filtering mechanism...low cost/low maintenance...and extremely effective!
The pickling lime is my kalkwasser mix...same stuff the major vendors sell but that container in the pic is nearly a years supply and cost me $1.49!!! I mix 1/2 teaspoon with 1 gal ro/di water and drip it nightly.
Thought some of ya'all would like the refugium pics and lay-out.....In my opinion a well set-up/maintained/functioning refugium is one of the basic foundations for a well developed reef.