Hi Ctross09,
Here's a great guide for brushing up on basic bio as you call it ..
Darkblade's Primer
Yes, longer lights will allow you to utilize "all the nutrients," but what happens when you've utilized all of it and you're running on empty? Darkblade makes a great analogy about cars/gas/maintenance. You didn't mention what light you have, but if you have a specialized light and/or running that light longer than you should, then depending on what part of seachem's line you're using, you're not using enough. The same applies for co2. When you said you 'dose', I'm assuming you're using liquid co2 (excel)? If that's the case, again, based on your light period/intensity, it may not be enough.
Here's a great guide for brushing up on basic bio as you call it ..
Darkblade's Primer
Yes, longer lights will allow you to utilize "all the nutrients," but what happens when you've utilized all of it and you're running on empty? Darkblade makes a great analogy about cars/gas/maintenance. You didn't mention what light you have, but if you have a specialized light and/or running that light longer than you should, then depending on what part of seachem's line you're using, you're not using enough. The same applies for co2. When you said you 'dose', I'm assuming you're using liquid co2 (excel)? If that's the case, again, based on your light period/intensity, it may not be enough.