The stuff on the rock came off after a little scrubbing with a wire brush.
I let it soak in vinger and water for a bit then brushed it with the brush.
Could it be just moss or something like that??
I'm going to hit it with a 3000 psi washer latter today..
If it don't come off - it most likey won't
Pete
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Hardware - 90 gal reef ready, ProClear 125 Wet/Dry w/Rio 3100, 220 Coralife Super Skimmer, 9wTurbo-Twist UV Sterilizer, 2 Maxijet 1200 w/hydor FLO deflectors. 110lbs of live rock, 2 PFO 250w 10k HQI, 2 48" Aqualight T-5 Fixture 28W 10K T5 bulb
Software - Blue Tang, Yellow Tang - Hawaii, Foxface Lo, Ocellaris Clownfish, Yellowtail Damselfish, Blue/Green Reef Chromis, Sleeper Blue Dot Goby, Turbo Snail, Scarlet Reef Hermit Crab, Dwarf Blue Leg Hermit Crab |