Lily pipe question!

[Wildwhimsy]

I’m setting up a 13 gallon shallow tank with a fluval 107 and inline diffuser for co2. I’m thinking of getting this style of lily pipe but unsure of placement with the outflow being different. Do both pipes go side by side or …?

 

[JayP]

I use the exact same pipes in my 7g cube tank. I have them mounted in opposite back corners, but since the tank sides are only 12", the pipes are only 7-8" apart. They work great.

 

[Wildwhimsy]

I use the exact same pipes in my 7g cube tank. I have them mounted in opposite back corners, but since the tank sides are only 12", the pipes are only 7-8" apart. They work great.

Do you think they work well in a 13 gallon shallow? Dimensions are 24.17" L x 10.83" H x 12" D (or roughly 24" x 12" x 11"). I’m still wondering where to place them in a tank this size