just thought of a couple more questions...
what type of filtration are you using? Is there any surface agitation being caused by a HOB filter etc?
do you have a co2 sensor in your setup? if not have you tested for co2 levels to see if they are high enough? you should be able to buy a test kit at your lfs if you don't already have one...
Are the bulbs new or used? They generally only last up to 6 months or so before you need to replace them. also i've read mixed reviews on the value of these bulbs for plants but I have no personal experience with them so i can't say for sure. do some research on them and see what you come up with.
what type of filtration are you using? Is there any surface agitation being caused by a HOB filter etc?
do you have a co2 sensor in your setup? if not have you tested for co2 levels to see if they are high enough? you should be able to buy a test kit at your lfs if you don't already have one...
Are the bulbs new or used? They generally only last up to 6 months or so before you need to replace them. also i've read mixed reviews on the value of these bulbs for plants but I have no personal experience with them so i can't say for sure. do some research on them and see what you come up with.
