IMO always listen to the tank builders and if you have a question ask them directly. This is one of the issues where IMO it's better to not listen to forums and only to the manufacture. If it's not clear about if their stands or not just ask them for more info. Proper tank support is too important to ignore. There is the FAQ section from them that says no, but I would still ask them:
Question Should I put closed-cell foam under the 93g rimless? What is the manufacturer's recommendation, foam (type?) or no foam? Thanks
Aquarium Type: Saltwater
Aquarium Size: Large (60g+)
asked 1 year, 3 months ago
The manufacturer does not reccommend foam under any of their tanks. I have a custom stand but it is an "open top" type just like Marineland sells for these tanks.