old lighting, new 40Breeder. Will this work?
I recently upgraded to a 16" high 40 breeder for my two goldfish, from a 28 gallon 18" high. On the old tank I had an AH supply 55W 24" fixture. I've never dosed CO2, but I run a planted refugium on reverse cycle and I've always thought that maybe the two tanks dose eachother with CO2 alternately (though I've never been able to really verify that). Sometimes I add florinaxis but I forget a lot. I could also add excel, but I haven't recently because it seems to make my vals short and stocky rather than long and graceful.
Now that I've upgraded I have a bunch of lights sitting around. I have 2 18W craptastic "kit" fixtures, and then I have the good AH supply setup.
I know with standard wpg estimates I'd need like 80W for comparable light to what I had before, but I'm wondering if I really need that much since the bulb is lowered by 2". I plan to mostly plant under the 24" of fixture, leaving some shadowy edges for anubias and other lower light plants. Is this 55W going to be enough? If not, would adding one of the 18W'ers help, or not really?
pygmy chain sword
giant hair grass
I'd like to do some carpeting plants like HC, micro sword, or dwarf hairgrass, but the goldfish are more of a problem than the tank conditions for that. Still I'd like to not have the light be the limiting factor.
Thanks for your help!