the science is great, I need simple advice

I love reading the science behind why we are throttling back light --but I need really simple advice.

Assuming light on two inch legs, and a 20 inch high and 20 inch deep tank, and assuming I am attached to my L glandulosa and tonina fluviatalus, and especially the nice orange I am getting out of my newly aquired Ludwiga Var. Pantanal.

How much light do I need? and even more important, do I make the change all at once?

do I try a noon time blast ?

my options, unplug all but the 96 watts
swap the 96 watt for the 25 and run that and the 40 watt current fixture

buy a new fixture altogether.


I am dealing with a tank that is a little wider than some.. so I need to consider coverage back to front a bit.. but I would love to trim a little less, still see pearling, ect.

Hoppy sold me on drop checkers
Tom recently helped me pull my tank back from the brink of bba hell by diagnosing a co2 issue.

now.. help me try to rebalance light. I know there is a slight lack in me that makes it tough to rework the science on my own.. but take a little pity.. I am a single mom working full time at a major computer r&d department along side computer phds when I am actually a journalist by trade ... (the kids need more than the avg newspaper job can provide). My poor brain is on overload and I don't have the bandwidth to figure this out on top of the rest.

Help?

 

btw. Glenc meet Tom, Tom meet Glenc. Glenc grows the most amazing reds without effort. We all want his secret

you took away my algae issues with the co2 fix... I think of lowering light because slowing growth would be nice .. keeping a scape for more than 4 days ect... and because I wonder if the macrandra is just using up some weird micro nutrient.

for an article I have yet ot give apcentral, I interviewed brad from the florida nursery and he said that they can grow mac great as long as there is only a bit of it in a tank. The tanks that are all mcrandra have horrible looking plants. Also in asia, where it was growing in water fed by a running stream it is gorgeous. There is some magical micro nutrient I must be using up even with ei.

I will turn off 40 watts first

How do you propogate the Pantanal.. (I have a little cuba. It is nice but not for the red spot.. It looks yellow in my tank