Tough situation. You did what are the core things I would think to do. Get a heater into the display. Presumably keep powerheads going. Stop the leak by remote controlling things. Did a great prep step of having a camera.
If you can get someone able to check the seem for you to make sure it's not going to catastrophically explode, I would have someone manually top it off if possible and then hope for the best for when you get back.
If you think you have a super high bio-load, the only other thing I'd add is ask your friend to move the powerhead near the surface to help with air, but I'd only do that if I was very simple to do. Eg not a vortech where they might get things misaligned and confused.
My sympathies. That sucks. Always happens on vacation for some reason.
If you can get someone able to check the seem for you to make sure it's not going to catastrophically explode, I would have someone manually top it off if possible and then hope for the best for when you get back.
If you think you have a super high bio-load, the only other thing I'd add is ask your friend to move the powerhead near the surface to help with air, but I'd only do that if I was very simple to do. Eg not a vortech where they might get things misaligned and confused.
My sympathies. That sucks. Always happens on vacation for some reason.