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reefcentral123
01/08/2016, 01:14 PM
hi

i used to have higih nitrates 50 ppm lots of algae. now i got nitrate down to 1 ppm by putting shot of vodka in aquarium every night and use denitrator media.

but algae still not gone n weird red stuff growing on unknown sps:

https://i.imgur.com/NRJB22L.jpg
https://i.imgur.com/FkGlAZc.jpg

here it is white light

https://i.imgur.com/L3nh7xh.jpg
https://i.imgur.com/kDIC69o.jpg

edit: when i got it it looked more furry with polyps but now the original piece does not look so hot but it has been encrusting on rock.

dkh is at 13

skp
01/08/2016, 01:17 PM
I read that dosing vodka can fuel cyano bacteria.

reefcentral123
01/08/2016, 01:26 PM
thats what i read too thats why i stopped dosing the shot per night a few days ago.

do u think the coral is looking bleached? it has not grown horizontal or vertical only on rock encrust. the LED is 3 inches above water coral is 3 inches below water. ty

skp
01/18/2016, 04:58 PM
thats what i read too thats why i stopped dosing the shot per night a few days ago.

do u think the coral is looking bleached? it has not grown horizontal or vertical only on rock encrust. the LED is 3 inches above water coral is 3 inches below water. ty

I'm not trying to be funny but I couldn't see a coral in your pics...:uhoh2:
Leds are pretty strong. They are more point source like laser beams than other lights and so difference in water clarity can have a strong enough impact to bleach corals. With that said, it doesn't matter how clear or not your water is, you're going to kill your corals being that close. I don't think it is good for the fixture to be that close to water and you should try to leave your highest corals at least 7-9 inches below the water surface.