Yeah I have 3 24×18×18 rimless tanks that were set up as breeder tanks for clown pairs when I did salt. I had the lfs I was helping at get to many and he sold them to me cheep. I dont usually do rimless. But I set them up with yoga mats under them and a clown pair in each with a fake anemone. Worked great. I was breeding clowns for around 5 years. They are also drilled in the back bottom left corner. That was another reason for the reduced cost I think I got all 3 for $100. I just cut a hole in the mat and plywood under the tank. Never had any issues with the tanks. Also with no trim on it save my hand/wrist from scraps when those little so and sos would unexpectedly attack. Lol