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Old 01-11-2005, 09:59 PM   #1
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Metal Halide & Algae Blooms

I have just installed new 250W MH on the 125 and my corals are not opening up as well and I am having a terrible algae bloom (Smothering Corals Too). The other thing is that I have just transplanted about 70lbs of coralline encrusted algae and no it is turning whitish. I transported the LR submerged too. So all of this is going on and I don'tknow what to do. I am dripping Kalk as well. Please help me figure out what to do about the green algae bloom.

125 gal w/ 40 Gal Sump (Sump 4"DSB)
4 - Maxi-Jet 1200 Wavemaker Pro
1/3 HP Chiller | 25W UV | Seaclone Skimmer

Lighting: 3 x 250W MH 20K | 4 x 36" Actinic

Polyp/Coral/Rock: Pulsing Xenia | Ricordia Florida | Star Polyps | Button Polyps | Red & White Carnation Sponge | Small Hard Colt Tree | Brown Meat Coral. 120lbs of LR

Fish: Huma Huma Trigger | Yellow Tang | Royal Gramma | Cleaner Goby | 4 Four Stripe Damsels | 1 Three Stripe Damsel | 2 Domino Damsels
Large Red Crab | Hermits |Snails, etc.

39 Gal
Lighting: 30" 50/50 PC | 30" Single Actinic
Filter: Penguin 330 Biowheel

Polyp/Coral/Rock: Green Eyed Zoos | Colt Tree | 50+lbs of LR

Generic Powerhead | 9W UV
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Old 01-12-2005, 07:55 AM   #2
Join Date: Oct 2003
Location: WI
Posts: 1,783
Algea is caused mainly by excess nutrients not by the light directly. Algae grows due to nitrates and phosphates;intense lighting will make it worse! Best bet is use an RO/DI unit to make all the water and make sure you run a good skimmer and practicce good tank maintenence!

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Old 01-12-2005, 11:36 AM   #3
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Location: Prosper, TX.
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Did you use a slow period of acclimation for the new lighting? Adding MH to an existing reef can be shocking if it is done too fast.

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algae, halide, metal, metal halide

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