Build part 1 - the wet bits The lights will be 4 sets of these, 2 on each side: http://www.ebay.com/itm/DIY-3-x-3W-R...item5af24a76da I contacted the seller on ebay and got him to post a new deal with 4 sets, with a power cable splitter (1 to 4) and postage for $40. Arrived within a couple of weeks from HK. I used left over bits from plumbing my tank, and got the reducer from the garden centre - actually for free from the aquatics guy, as he found it in a box with a pump for a garden pond, which already had missing bits and had been reduced. I chopped a bit off with a junior hacksaw, then used PVC glue to glue the PVC pipe into it. A nice snug fit. I'm not bothered if it leaks a bit as it will all be within the sump, and I could seal it a bit more with silicon if needed. The only bit I bought was the end cap for a couple of quid, the NJ1200 pump for Â£20ish of ebay, and a bit of pipe for couple of quid. I feed about 1/2 cube per day at the moment (and about sheet of Nori spread out over the week for my foxface), but plan to have 3 tangs, so will have to increase that at a later date. The screen is 31.5 x 14cm. I make this big enough for 5-6 cubes - right? I based this on the max sized screen I could fit in, with a NJ1200 (that limits the width, as you need to provide 65lph per cm width). The NJ1200 would cover about 13-14cm width at this rate, at about 50cm head height.