Fish are all dying after filter bombed out, can't replace it right now what do I do?

OK, the night before last I cleaned out my fish tank. It was a bit over due but the fish were still healthy and alive. However, the filter would not come back on when I plugged it back in, I primed it and everything. It's done this before but usually for no more than a few hours before spontaneously restarting (or restarting when bumped). This time though, it isn't happening. It's been nearly 48 hours, half of my fish are dead and those that are left will most likely die soon too. The water is horribly murky now, and is looking pretty gross. To top it off, there are some sort of tiny parasites swimming around in the water now. I can't leave to go get a new filter right now, not only have I been sick but we are snowed in. What can I do at this point to save the few fish and snail that is left alive. There might still be a fiddler crab left alive in there too, I can't tell...