Yes, I should have said "every 6 months". Even changing at that rate is much cheaper than the cost of a UVB meter, which I looked into. Interestingly, I have been in recent touch with Leann who still feels that D3 supplementation for day geckos, as opposed to UVB is the way to go (not that she feels UVB is wrong, but she continues to be successful with her D3 methods). Alan Repashy states that he has done a fair amount of research into formulating his Calcium Plus (though I don't have access to his studies). I will think about the day geckos, though.

Aliza