crack in floor of shell, How do I fix it?

I raised it up, and if you only put 3 " of water in, not as High as any jets you get a leak. I spotted the crack from top side, it's about a 1 inch long hair line crack. Thanks for any advice

typically in the case of cracks I usually reccomend that you hit up a boat repair facility, anyone who does repairs on fiber-glass or acrylic should be able to help you out.

Thanks for the info.
Got the bondo fiberglass patch kit from autozone
and patched it from the bottom side, with no sign of patch from the top side and no leak anymore.

thanks, problem solved.