What size uv should I get?

[corey904]

unfortunately a couple days ago I noticed I had ich on my fox face rabbit. Since then I’ve been using a 15 watt UV that I had from a smaller tank. Im planning on buying a larger UV for my 110 gal system and I see on BRS the 25 watt and 40 only have a difference of 80ish dollars and to me it seems like a better deal to get the 40watt. If it works better at dealing with the ich
Are there any downsides to getting a larger UV 40watt Uv for a 110 gal system ?

 

[JumboShrimp]

I have a Pentair 40W on my 150 gallon, and I like it. But know that it is a beast— and you have to essentially factor it’s length by ‘double’— you essentially need as much room to pull the bulb out as the thing is tall. I mounted mine behind the stand, as you can see, and the bulb pulls straight up toward the ceiling.