sizing

Hello, I am debating on building a tank out of acrylic and I’m wondering if i use 1/4” thick acrylic, what would be the max size tank I could build that would be safe? I could go bigger, i was looking at 1/2”, but it’s pretty pricey at that thickness. Also do you have any recommendations on...

So I have a yellow spotted scorpionfish (about 1”) and saw a fu Manchu lionfish (about 1.5”-2”?) for sale, I was wondering if they would be okay in the same tank at their sizes or should I place the lion in a separate tank. My scorpionfish eats large Amphipods, but I also have saltwater grass...