Hello all, I'm looking for recommendations on a siphon or vacuum for water changes. I CANNOT use the Python system as my faucet will not adapt to it, and I rent so it isn't my decision to go overhauling the hardware. I don't want a "self-priming" thing, the ones you pump up and down, as I have sand in a 29 gallon tank and that just causes massive sand disturbance. I've seen a few products on Amazon that have hand pumps to get them started, but they have mixed reviews. Does anyone have a product they can recommend?