I currently have 2 florida gar and a tsn in a 180gal, and am working on my build of a custom tank. I want to now what width i need so the gar have enough room to turn around with out problems. One is about 8 inches and the other is about 5-6 atm. If i build a 84Lx40Wx28T will that be enough or shall i go a bit wider. I have the 6ft 1/2 glass alrdy i just dont want to go to wide if that wont hold up the pressure. Also im a bit unsure how i want to do my filtration because ive always had HOB filters. Any input would be helpful.