quarantine

[keith]

I am new to the sw hobby . My 100 gal FOWLR has been up and running for only 3 weeks 75 lbs LR , ramora pro skimmer, 2 seio 1500 ph, ac500w/charcoal ,30 lbs sand, coralife compact c lighting. Am considering overflow box and 10gal sump. Water parameters are sg-1.023,nh-0,no2-0,no3-5.0,ph-8.4,temp-79.5f. I have a few questions so please bare with me. Do i need to test for calcium and phosphorous?.I have 2 QT 15 gal tanks set up with 2 percula clowns ,2 firefish gobys in 1 and 2 skunk cleaner shrimp in the other. All are eating and doing well . they are in week three. I plan on keeping them in QT for another week. My main tank is beginning to get some brown and small pieces of green algae and i was going to get a few snails and was wondering if they needed to be put in QTfirst? And what kind of snails should i consider.thanks in advance for any input. PS- I also have another 35lbs of Lr curing in a rm trashcan will this now be enough LR. THANKS--KEITH