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I haven't heard of TMC up until now, probably because it's not sold in the major reefing websites as TMC seems to be targetted towards ponds. Looks like the TMC 55W is going for $300, which is an excellent price wrt the other major brands. What are the trade offs to the $450-$700 models in the same 55w'ish rating? Or is it more along the lines of reefers willing to pay out the nose for products targetting their specific hobby/application?An UV will clarify algae/bacteria at sterilization levels certainly, you just need to be moving 2-3 times the tank volume through the unit per hour. I’m using the TMC 110 which recommends 10 gallons per watt per hour for level 1 sterilization, so 1,100 GPH. That means 2.75 for my 400 gallons. For 200 gallons, I’d view 55 watts as ideal to run 550 gph. Also keep in mind that most 200 gallon tanks don’t actually hold 200 gallons so that gives you some wiggle room.
https://www.americanaquariumproducts.com/TMCUVSterilizer.html#cart