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I know this isn't what you want to hear...but from that picture, it looks like the bulb is brand new. If you can clearly see through the bulb then its a new bulb. As soon as electric passes through them, the gas inside the bulb causes a haze on the glass. Compare it to an old bulb.
But that...
Are the physical bulbs harmed at all?? Are they completely clear?? I know my bulbs...when brand new they are completely clear....but as soon as they are first used, they get cloudy when off...
I've been trying to find a solution to them as well. I have not yet found a predator of them. Short of snapping them off one by one, they really will never go away.
I'd definitely say Vermetid Snails....I have them as well. They reproduce a lot if they have food...but they will die off as well. But the tubes will always stay.
So either raising them or changing the length of time is easiest. Raising them a foot...is that enough?? Also, how often and how far should they be moved down??
Ryan,
Met you yesterday....go to the Asian market near Hanover Pet. I got a package of 100 sheets for about $10-$12. How are those corals making out for you?