I just got 40 lbs LR from LFS about a week and a half ago. When I first got it,the LR had a touch of purple, green and yellow on the rocks. Then it turned white in some places on the rocks. Now it is slowly turning brown. Is this normal? my phosphates are 0 . nitrates 20ppm I use RO/DI water also.
90 gal SW tank / cascade 700 canister fliter / Coralife super skimmer / 3x402 PH / 100lbs LS / 80 lbs LR / 30lbs base rock / 2x65w & 2x96w PC / 2 moonlights
Have you tested for ammonia and nitrite? If you added LR to the system, it is likey that you've caused a cycle to take place. It is pretty normal that the LR won't look too good until things settle down.
You dont have to point the powerheads directly at the rocks just as long as you have good circulation. Let the green algea take place. The live rock you bought was probibly not cured. If it gets out of hand and the green algea starts growing on the glass and on the sand add some snails and some dwarf blue leg hermits will clean off some of the die off from the LR. 10 of each should do the trick plus you can keep them afterwards they will keep your tank squeeky clean.
20 Gallon Long, 2 Ocellaris Clownfish, 3 Dwarf Blue Leg Hermit Crabs, 1 Carpet Anemone, 1 Peppermint Shrimp, 20 LBS of LS and about 6 LBS of LR.
Marineland Millenium HOB Filter.
Marineland Seaclone 100 Skimmer.
2 10,000k HO
2 Actinic HO