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They do seem to take a hit on GPH but I would say the bigger the pump the less % reduction. I had a Mag 7 I tried to hook up to one and it felt like it cut the flow nearly in half, plumbed off the return and then each end of the scwd outputting to a line back into each side of the tank. I...

Also you may want to bump that salinity up a little. Fish only tanks can do fine with 1.023 and a little below but once you start adding inverts you really need to start keeping it at 1.025-1.026 pretty religiously. -Jerry C.

Originally Posted by SCSInet One thing they make is a plastic tube that slips over the bulbs to protect them, but what you really need to worry about is the connections at the ends. IMO, if you use waterproof endcaps though, the water should not pose any problem for the bulbs. Ok, so I am...

Yeah I do use waterproof endcaps. The protective tube method seems like it would make the bulbs get too hot and keep all that heat in though. -Jerry C.

What is the best material to use as a protective lens for VHO bulbs. I have an old wooden hood in which I installed VHO 48" tubes with an Icecap ballast long ago. I currently use the All-Glass glass canopy on the top of the tank and would like to remove the glass top but I need to build lens...

Originally Posted by acrylic51 And my thinking is why try to reinvent the wheel.....MH's have been around forever and have been affective.....There are ways to use MH's without the need for a chiller..... This is all very true but MH's were pretty expensive as well way back when. LED's are the...

You don't have to create any back-pressure on your pump in any real way. Just T-off your return line and put a ball-valve on a line back into your sump. This way any extra capacity can be controlled with the ball-valve to bleed off that extra capacity w/o stressing the pump. An alternate...