Is this an acceptable level?

[MzFixIt]

I had this tank at my old house but it was setup by someone else so I do not have any idea if it was spot on level, or off slightly.

However, I am now resetting it back up at my new place and when I put a level on it. From side to side it is spot on. Front to back, in an ideal world I should probably shim the back but I cannot do it myself.

Please look at the attached picture and give me your opinion regarding if this slightly off level is acceptable to move forward with filling my tank (108 gallons). It is "technically" within the lines and if I was building something I would be happy as long as it falls between the middle lines. However, I wasn't sure the rule of thumb when one is talking about all that water? Any suggestions/opinions will be greatly appreciated.

 

[enderg60]

Shim it, thats not close.

 

[acandoit]

I could see myself going forward with this but then hating myself over the years when the water level drops enough to see the difference. Luckily I have a wife that is a perfectionist that keeps me from making bad long term decisions to avoid short term pain...lol

 

[dball711]

Shim it, thats not close.

+1, leaving it like that can only lead to a problem down the line.