JonPM Posted November 12, 2004 Share Posted November 12, 2004 Well, I just upgraded my lights from 36W PCs to 70W MH, and a day later one of my polyp colonies isn't looking so good. Please see the picture below. Is it normal for them to do this when the lighting intensity changes? All my params are good and have been stable with no flux for months. Any ideas? Link to comment
JonPM Posted November 12, 2004 Author Share Posted November 12, 2004 Also, I have 4 other polyp frags that haven't changed at all. They even seem to be blooming better. I have had the pictured polyp colony for a couple months without any problems. Link to comment
Tigahboy Posted November 12, 2004 Share Posted November 12, 2004 Are you gradually adjusting them to the lights? Like only having lights on for a few hours, then increasing 1 hour every few days (or once a week) until you get to the normal 9-10 hour photoperiod or having lights super high, then slowly bringing it down over the course of a few weeks.... Link to comment
JonPM Posted November 12, 2004 Author Share Posted November 12, 2004 Well, before the upgrade I had lights on 9 hours a day. After installing MH I kicked it down to 7 hours. Maybe this wasn't enough? Link to comment
Tigahboy Posted November 12, 2004 Share Posted November 12, 2004 Kick it down some more....like down to 4/5 hours....i think they are just shocked by the sudden increase in light...they should come around tho if slowly acclimated. Link to comment
JonPM Posted November 12, 2004 Author Share Posted November 12, 2004 How long at 4-5 hours? Kick it up an hour a week til 8/day? Link to comment
trmiv Posted November 12, 2004 Share Posted November 12, 2004 Go get some window screen and cut a few sheets. Put 5-7 sheets in front of the MH light. Each day or two days, remove a screen. This allows the corals to gradually adjust to the new light. Soon I'll be going from 70w MH to 250w MH. That's going to take a hell of a lot of window screen! Link to comment
yoshiod9 Posted November 12, 2004 Share Posted November 12, 2004 or you can raise the light up off the tank to allow more space between the bulb and the water surface. i think i just plain lucked out cuz i slapped a 70mh on my tank and am still running a 96w powerquad and haven't seen any ill effects and it's been a couple weeks now! Link to comment
Tigahboy Posted November 12, 2004 Share Posted November 12, 2004 yeah....all of the above....I like the window screen idea actually...I think that would be the most effective way to go about it. When I acclimated, I had em on for 4 hours...increase an hour every 4 days....until it got to 9 hours. Link to comment
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