Hi, We usually provide our plants with 10-12 light period for photosynthesis. But what about the other 12-14 hours of darkness? how dark could they be? During the hot summer days I was turning on the lights during the night and in the morning/noon time the tank lights were off but the tank got tons of indirect sun light penetrating through the very big window in my living room. I noticed that plants weren't during very good and would like to understand if it was more of a heat issue (29-30C). I think plants need darkness in order to respire but this ends my understanding of this. Could anyone please educate me a little more? Aviel. _______________________________________________ AGA-Member mailing list AGA-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/aga-member