1. Apr 15, 2021 #1
   Ely, IA

   Richard Crotty

   25

   Ely, IA

   Ratings:

   +4 / 1 / -0

   New to the game, and I am planning on drilling my 40 gal breeder tank. Looking for advice/tips on drilling and any recommendations on overflows/returns that you have had success with? Have my DIY sump in the works as well. Any advice there as well would be greatly appreciated!

    
2. Apr 16, 2021 #2
   Waverly, Iowa

   nrenn Well-Known ReefKeeper

   311

   Waverly, Iowa

   Ratings:

   +29 / 0 / -0

   I had a standard 40B that I had planned to drill...it wasn't labeled when I bought it, but the bottom ended up being tempered. I'm told the 40B is really hit or miss for being tempered or drillable.

    
3. Apr 16, 2021 #3
   Marion, IA

   AdamLawrence Well-Known ReefKeeper

   542

   Marion, IA

   Ratings:

   +171 / 0 / -0

   The 40 has a tempered bottom but you should be able to drill the one of the side panels but always check with polarized glass.
   
   Sent from my SM-N960U1 via App

    

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