Electrical

The weekend is coming soon and I will need to go ang get some supplies soon, so some quick questions.

1). VHO- I have 4 VHO's on the system. I need to by two ballast and the seller said he buys them from the builder store. (Home Depot, etc.) the question is: What can y'all tell me about VHO lighting. I never used then before? And, do y'all get ya lighting from HD or where? VHO parts, endcaps, etc.? Should I mount the ballast and such under in stand are on back of canopy, what ...

I have 2 250 watt IceCap ballasts. One has a 14k hamilton and the other has a 12K Reeflux. By the way, both bulbs are almost identical to the eye.
I noticed that once in a blue moon my hamilton bulb would flicker (when I say flicker I mean a very fast and subtle flicker, one can only notice when paying close attention) but this would occur for about a minute and disappear for a long while. It actually doesn't happen anymore. On the Reefluc bulb, however, this flicker does not stop.
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Hello everyone,

I am planning a 120 gal FOWLR tank and am trying to establish about a 10x (1200gph) turnover through the sump back to the tank.

The question I have is are most reef addicts drilling their sump to attach a single external return pump (with an exact extra pump on hand in case of failure)? ... or inserting two smaller return pumps in the sump so in case one burns out the other will function until the problem is discovered (this was recommended by my ...

so Im having trouble maintaining the temperature at 79 in my 55 gallon with 20 g sump with about 15 g of water in it. Im running 1 150 watt in the return section and 1 100 watt heater in the 2.5 refugium. and 1 100 watt heater in the overflow section of my sump am I better off having one heater or 2? or is more the better? should i have one in the tank?

I completly redesigned my sump and replumbed my whole system will post pics when its completly finished

Thanks ...

The power went out 1 hour and 20 minutes ago. So my generator is running instead. Gotta keep my reef happy and my internet connection live.