out of the entire mfk, your the only person who doesnt seam to think much of filteration.
Im not agisnt the idea or anything, but think of it this way.
If you only want the best for your rays.... you want a dam good filter at least
set up a sump. Its not that hard. Its cheaper than an fx5, and you can customize it for your needs (ie lots of zeolite to break down the extra ammonia youll have). But the ideal would be a sump + fx5.
temp - do what you want with that. (its your money on the bills so its compeltely up to you)
Size of the tank: if you know you may have to upgrade in the near future its totally cool to grow them out in this. Providing there is enough filtration.
Just know it may be in the near future...
Looking at your sig, you clearly have some experience with keeping mosnter fish. And know the importance of filteration, i just fail to see logic on the filteration part of your project.
what filterration have you got set up on your other tanks?
At least weve pushed you to lean to go to a fx5. LOL so were going to keep pushing
until you overfilter..
) Haven't had any problems with my ray...