As long as you stick with dwarf variants, you might be able to fit a single additional fish. Anything more than that, you are playing with fire and will need to increase filtration by 125%.
How heavy is the glass? My 220 is 396 lb. per the website. The only 300 I have ever handled was acrylic.
They work great, Didn't have to slow the pump return at all. Running full pressure it fills to just below the top . It is a bit loud right now but I think most of the noise is the water falling from the pipe into the filter socks which I should be able to fix by simply extending the pipes below the water line.
To valderi123 there is a 5" hampala barb hiding in the back corner if you look real careful LOL
Just adding fish very slowly to avoid any huge spikes while cycling.
Impossible to fit under there for a pic now but here is before it was reinforced and surrounded by plywood
Either due to a crappy silicone job by me or expansion of the tub my baffles don't hold water I have to use a secondary pump to pump water over the drip plate but other than that it worked out pretty well