apparently i went the expensive route. i bought the jbj ato unit ($100). they fixed the issue with the beeper - there is no alarm at all when the pump is activated.
the bracket holding the float switch was pretty open, so i cut apart one of my fish nets and then tied it around the float switch box to keep snails, etc. out.
i also bought a pump that was way too big =/ the ato unit has a 3 minute saftey switch so that the pump cannot stay on longer than 3 minutes. however, i have a 10 gallon tank of RO water that the pump sits in and this pump can drain the 10 gallons in about 45 seconds.... so, that was probably dumb.
anyway, i'm very happy with the setup. i think i went the extremely expensive route though.