I have had my set up with a very active and a well balanced load of fish for three years. Never had a problem with algae blooms or hair algae. I always use and will continue to use 30 cents a gallon RO
water at a local water store. I do 10 gallon to 15 gallon water changes a month with coralife salt mix.
No faucet water and leave the garden hose outside!!!!!
I never add anything else to the water and I have so much pink and purple coralline algae, 90 percent of my rock is encrusted. I attribute this to frequent water changes with good water and a little luck.
I wouldn't trust San Diego water out of the faucet for my fish period, I don't drink it why should they.
I also use a fluval 404 filter with Chemi Pure and ceramics with foam.
In my 50 gallon tank I have 50 pounds of rock and an undergravel filter with 40 pounds of crushed coral. Plus I have a protein Skimmer on 24-7, which I clean out every 4-6 days and is it ever full of gunk.
50 gallon saltwater fish only...1 mated pair yellowtail damsels, neon dottyback, tomato clown, huma trigger, lemonpeel angel, 12 stripe wrase, bi-color blenny, dozen or so hermit crabs-scarlet and mexican, cerith snails, turbo snails, orange linkia starfish, 50 plus pounds of purple-pink coraline encrusted rock and a few mushrooms.
Redsea prism protein skimmer, 404 Fluval, UGF
with two 201 powerheads.
7 gallon tank with 6 pounds of live rock and countless brittlestars, 5 hermit crabs, snails and 1 False Percula Clown fish and Camel Back Dancing shrimp