Posted: Sun Apr 27, 2008 11:41 pm
The UVB is reduced if the holes are less than 1/2". Anything smaller than that will greatly reduce your UVB input. Don't increase the bulb, though, in case you irritate their eyes. (And I haven't seen a 7% UVB bulb, but UVB isn't additive, so if you have a 2 x 5% bulbs, you don't have 10%, you just have a wider area covered. Watch anything higher than 5% as it can irritate their eyes and skin.)
As for ways to extend the life, build an above tank basking area with an edge so you can fill up the tank up to about 2 inches from the top (aquariums don't recommend going over this point, with water weight and pressure, they aren't rated for more water) and extend the life a little. But start looking now for a replacement, probably a 75 gallon or so.
Oh, and you can get custom-made screens or make one yourself if you need the holes wider.
JAX
- - -
Baby Boy - January 9th, 2011! (3 months old)
1 RES - 7" long - Umi (3.5 years old)
1 black lab/hound mix - Josie (1.5 year old)
2 cats - Mysti and Molly (6.5 years old)