to much

[leaffish75]

After thinking my tank didnt have the problems with the corals dieing until i changed my lights. Does any one think I have to much light over my 20L? Since im redoing it I need some in put now. If i do then ill switch to maybe 2 96 watt pcs. Let know what you think. oh im running 300 watts vho. 3 actinic 75watt each and 1 10K 75 watt vho bulb. could i place a piece of screen material over the tank to cut some light?

 

[incysor]

If you just jumped into the new lights with no acclimation it's very possible you burned stuff. When I made the switch from 130w PC over my 75g to 440w VHO and 175w MH I cut my photoperiod from 10hrs down to 3 with just the VHOs. After a week I moved it up to 4hrs, then another week 5 hrs with one hour of MH, then another week and 6hrs with 2hrs of MH, etc...Until I got to my current photoperiod. Even doing it this slowly I managed to fry a couple corals. I really should have gone and gotten some egg crate and put several layers of screen material on top of it, then removed a couple pieces of screen each week instead.

B

 

[mikeguerrero]

Gradual climb in temps is always the safest route for your inhabitants and that means cutting down photoperiod until proper acclimation has been reached.

MIKE

 

[leaffish75]

well every thing seemed to do fine. nothing died off until almost 2 months after i made the switch then every thing went south. no corals showed any illness. i never had a temp change either. my pcs where 2 inches from the water surface and my vhos are 5 from it plus i have fans. I think i had a 1 degree water change thats it. Just the intensity. Even corals i added that came from under MHs died.