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I have no idea what the white sponge looking thing with spines is. It appeared on my live rock 2 months ago and has been growing slowly. For size comparison, a Firefish can be seen to the left. Sorry if the focus is not great, I need a better camera. It is Fiji rock and has quite an...

Doesn't RO/DI make water acidic? I have an RO/DI system to drink out of, and I tested the Ph of the end product and it was around 6.0 with the tap being around 7.6. My tap water is very HARD with calcium, Phosphates are practically nil, and my Ph hangs around 8.2 all by using tap water. Very...

I have a 110 Gal tank i am looking to set up a SW tank. I have 2 power heads (350 and 500 GPH), 2 canister filters (Rena XP3 350GPH each), a UV sterilizer (9 watt helical) and a pritien skimmer. I am hoping to get water into the tank and cycle it in the next week. But I am eing held up by...