hi chaps i know i can get some good advice off ya lol i just bought a 55w tmc uv strealizer its quite a monster puting it on my 6x2x18 marine should i limit the amount of time its on as it is comercial one and also where should i take the feed from and return it to i am in the process of aquiring (making a 4ft sump with inlet with skimmer etc then dsb then return all with lr and cheato can i have some info please chaps cheers