Job at LFS

the golden line, which is always indespensable when dealing with n00bs, or selling something you know will make a difference: i've always found in my experience

works everytime with those difficult sales.
 
i find comparing fish to cats works great.

"if i feed my oscar a feeder, will it be more agressive?"
" if your cat catches a mouse, does it make it also go after your other cats? no!"

"now that pleco will stay small cuz its in a small tank"
"do you think if you fed a cat and stuck it in a shoe box, it would stay a kitten?"

"my brother has 5 full grown oscars in his 10 gallon"
"my aunt has 10 cats in her refridgerator"
 
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