[germanblue]

hello i have a 20 long the left side glass has a crack on the in side of the tank abought 2 inch long will thise be ok and what would cause a crack on the insie of the tank iu have 1 firemoutrh 3 inch and 10 zebra danios

 

[Deeda]

I would suggest replacing or repairing the tank.

The crack could be caused by the tank not being level, being mishandled or accidently hit with something.

 

[moneygetter1]

8) Agree. Cracks never get better. Need to repair damaged pane or replace tank. 'T'