I think we will be just fine. Every site I checked said 24 is acceptable. We may try for 26 on the 415, but the 600+ will only have 24 for sure. Thanks to fishfobia who noticed the glass 5 years ago, let it sit there, and then told us about it. We will be building a special custom corner tank for him as a thank you (pending his wife's approval of the location). We will be detailing the work the best we can. I will have a new video posted soon.