EW! It's not my own pool, but the town's (huge) pool that I swim laps in. I agree, I wouldn't care to maintain a pool for myself- yuk! Expensive & way too much work. Besides, swimming with others is a lot more fun, & even some of the lifeguards are pretty entertaining at times too.
I never imagined leeches in a pool, but I once looked at a house for sale that had an un-maintained backyard pool, & it was full of the cutest little froggies!Zillions of tadpoles all the way up to adult frogs looking back at me, just daring me to jump in. I passed on the opportunity.
Besides, it would have taken me forever to relocate them all...
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As for feeding rodents- I've used a couple other brands of rodent lab blocks in the past (subject to what was available where I lived), but never dog chow. I currently use Mazuri. I prefer to stick with food that's balanced specifically for rodents. But hey, I just discovered my mice enjoy bits of fresh tomato when I was cutting up some of my garden haul. They're usually such fussy eaters, I normally only give them bits of greens (kale), carrot or apple. Didn't expect they'd like tomatoes?