Stupid Question

[scu ba]

I bought a 240 gal tank for all my sfe and lion

:jumping: and now making my 55 into a reef tank my ? is now that I put in a deep bed (jaubert system) my tank only took 34 gallons of water. When i do 10% water chages later on how much do i do 3.5 or 5.5 gal? :notsure: Thank you

 

[zman1]

Why not just do 5 gal - easy to measure out. There isn't an exact precise number. 10% water volume would be the 3.4 gal.

 

[patrick8929]

i agree it would be easy to just do a 5 gallon water change