Sorry to see there is a leak, you might try to seal all of the epoxy joint seams with RTV silicone or some other silicone, if you've not done so. It may also provide some protection for potential seam stress cracks.
On a separate point, I'm interested in the mechanics of actually moving the tank once it's loaded with sand and rock (assuming you're doing some substrate, etc.). With a mass of this size and length, pushing or pulling may put some torque on the support beams that may transfer up to the tank box. (I'm assuming you would not try to push on the tank itself as this would almost certainly stress the seams.)
You may need some pulley devices to even out the forces on the attachment points. Will you use some kind of motorized winching system to pull the tank out at a very slow speed? There will be a lot of inertia to overcome and if the tank starts moving to quickly, the water will be left behind initially and create a rather large slosh forward, then back---your rock work will need to be very stable so things don't tumble against a sidewall. Once it's moved out, how will you reverse the process to put it back in the original location? Will you be leaving the fish in the tank when you roll it back and forth from the wall?
Sorry about all the questions, but moving this tank looks like a challenging engineering problem to solve.
On a separate point, I'm interested in the mechanics of actually moving the tank once it's loaded with sand and rock (assuming you're doing some substrate, etc.). With a mass of this size and length, pushing or pulling may put some torque on the support beams that may transfer up to the tank box. (I'm assuming you would not try to push on the tank itself as this would almost certainly stress the seams.)
You may need some pulley devices to even out the forces on the attachment points. Will you use some kind of motorized winching system to pull the tank out at a very slow speed? There will be a lot of inertia to overcome and if the tank starts moving to quickly, the water will be left behind initially and create a rather large slosh forward, then back---your rock work will need to be very stable so things don't tumble against a sidewall. Once it's moved out, how will you reverse the process to put it back in the original location? Will you be leaving the fish in the tank when you roll it back and forth from the wall?
Sorry about all the questions, but moving this tank looks like a challenging engineering problem to solve.
