That isnt how water pressure works, I can explain if you want but believe me that the 3 ft of 5" pipe pushes down exactly the same as 3 ft of .0000001" pipe, but you will get way more volume of water going through the 5" because of the wall friction.
Huh, it makes no sense to drop to a smaller size, the only possible reason would be to increase the velocity of the water coming out the returns slightly, and this can be much better accomplished with some nozzles, I would not change the plumbing size unless I was doing it all anyways and needed...
No, I just happen to have one because I have some older ballasts I got as a part of a package and that seems to be all they will fire.
It's yellow, but with some actinic PC it isn't unbearable, I prefer 12k bulbs myself though, can;t comment on growth sorry.
I was wondering if the mogul bases for the HPS and for MH are the same and if I could buy this fixture, sell the ballast and bulbs, and put in aquarium appropriate lighting (i have new icecap 250w ballasts I could put in them.
Is anyone familiar...