Uv light

[evox53187]

I have two 9 watt uv lights in my filters is that enough for a 125 gallon tank. Or I was thinking about getting a 13 watt one since I have bulbs already

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[Catfishguy721]

i am guessing you have sunsun/ Grech filters? The white R2D2 looking ones? I have a 150 gallon tank with 2 grech 305B filters with 9W UV each and i have had very good results. More is not going to hurt IMO
Depends what fish you have as well and water quality they require