Well here is my thoughts;
I have heard many bad stories and talked to a few people first hand that had their Aquagiant tanks break or explode.
This is not a place a would pick to save a few dollars, everything else relies on the strength of the tank. Not to mention changing a tank at a later date is a huge job, totally not worth it.
If you want a custom tank try Dave at Concept Aquatics http://www.conceptaquatics.ca/ there is several threads on here about Dave and his great work.
Agree 100%
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One more fish should be ok?, right!!! - Laurie