coralline..?/????

[chuysvt]

my mh light are bleaching my coralline.....what can i do to.....

 

[parrotchute]

It's probably not your light.
Salinity and temp imbalances are more likely.

 

[michaellee]

are you dosing Stront & Moly, as well as Iodide? That's how I keep mine purple

 

[parrotchute]

Unless you have a super high amount of hard corals, I don't think it'd be necessary to dose anything.

 

[chuysvt]

i put one of my rocks that had alot of coralline i bit higher so it can transfer some coralline...and it started to fade away.....coralline does grow but only were theres not that much light or in the lower part of the tank..

 

[chuysvt]

and my levels are ok...

 

[AmberSunrise]

Sounds like you have nothing but trouble with those lights. How far up off the tank are they?

 

[Bifferwine]

Was it ever exposed to air? Take a razor blade and just scrape the coralline off into the water to make it spread.

 

[BL1]

I don't get any coraline growth under my 250w MH either, on the undersides of the rock and the sides of the tank I get a lot of coraline growing. I don't think it grows well under such bright lighting.

 

[parrotchute]

I had it growing all the way up to the top under my AI's...
When you do your water changes, does the water drop down that far?

 

[little_fish]

If your light is very white, it doesnt grow nearly as well where the light is bluer. The blue wavelengths penetrate the water deeper which is why the coraline is growing towards the bottom of your tank and not at the top, the top of your water column is getting too much white light

 

[sen5241b]

I had exactly the same thing happen. MH light, if it gets too close to coralline, will bleach it. Blue light 420nm will make it grow like crazy.

 

[Wes888]

I don't get any coraline growth under my 250w MH either, on the undersides of the rock and the sides of the tank I get a lot of coraline growing. I don't think it grows well under such bright lighting.

i've noticed on mine as well. The coraline doesn't like bright light. The more shaded area are more purple in my tank. However, no mine, the undersides gets almost no purple thou. It does need light, just not a lot.

 

[chuysvt]

my lights are really white..i want to change the light bulb but it like $100 each...the light are 1 feet from the tank...

 

[BL1]

What?? $100 per bulb? You're looking in the wrong places then, I got my bulbs for about $55 a piece.

 

[Bifferwine]

Do you want to replace MH or T5 bulbs?

 

[BL1]

Do you want to replace MH or T5 bulbs?

I'm guessing MH, his sig says 2x250 MH

 

[chuysvt]

mh...mine are high because there the double ended..and there 250w

 

[Bifferwine]

Check here:

http://www.reefgeek.com/lighting/Metal_Halide/Bulbs/250_Watt_DE_(Double-ended)/

 

[BL1]

mh...mine are high because there the double ended..and there 250w

That doesn't mean anything, my 250w MH are double ended and they're only 5-6" above the water.