04-29-2007, 05:39 PM
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Kuhli Loaches will make short work of any shelled underwater organism. You could invest in a pair if these snails begin to overwhelm your tank. They only grow up to 4" max and are quite interesting to watch when in pairs or more. They 'dance' with eachother, it's quite amusing. They're also very friendly to other tankmates.
However they are nocturnal, and will often disappear for months at a time (not completely, they will come out at night for food and to hang around). Many people have been cleaning their tanks and found themselves face to face with a fish thought to be lost long ago. They are very crafty and notoriously difficult to catch once in a tank. To observe Kuhlis, I'd recommend a 'moonlight' fluorescent tube, which should coax these loaches into coming out.
For you 7Gallon Betta tank, Kuhlis may not be an option. You could try a Dwarf Puffer, as they only need about 3 gallons to be happy and will effectively control your snail problem. Although there is the potential of conflict with the Betta since some
, not all dwarves, are pretty aggressive.