coralline disappearing

[ohioreef71]

I've been noticing my coralline slowly going away in my tank. It is strange but in the shaded areas under rocks and overhangs it seems to be flourishing. All my water specs are fine nothing has changed and my water changes and dosing is always on schedule. I have a 4 bulb T-5 fixture on a 55g being over driven by an icecap 660. I did recently replace my bulbs. Had 2 actinic white 1 454 and 1 blue plus. Now it has 2 super actinic and 2 6500k grow bulbs. The light output is more white than blue now. Do you think the lighting did this to my algae?

 

[Randy Holmes-Farley]

How long has the tank been set up?

 

[ohioreef71]

Been set up almost a year.

 

[Randy Holmes-Farley]

Coralline often dies off after initial curing of live rock, but that sounds like it is substantially in the past.

Many species of coralline like less light than we provide for our corals, and that might be the case here since it seems to be thriving in lower light areas. There are species that grow in higher light, but they may not be present on the rocks you have.

Perhaps get some scrapings from a friend who has coralline growing in bright light?

 

[ohioreef71]

Thanks I might try that my rock looked so nice not too long solid purple most is starting to get covered with blue cloves now so it almost looks the same from a far.

 

[greengeco82]

Mine did the same thing after I got 3watt leds. Everything under was flourishing and the tops were just rock.

 

[killarsox]

Sounds like a magnesium issue.

 

[greengeco82]

Try increasing your water flow. or look where there is more water flow and see if there is more coraline.