Reddit mentions of Hydrofarm AAPW160 Active Aqua Submersible Water Pump, 160 GPH

Get the small pump:

https://www.amazon.ca/gp/product/B002JPGE6S/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

$20 and it saves you worrying. As I mentioned above, I have found many other uses for that little pump after I switched to a ferm chamber.

If the water had to be replenished daily I would just shoot myself, or I guess grow in soil. Like the others said: change every 7-10 days, top off as needed, keep pH ideally at 5.8.

For pumping water out, I use a more heavy duty pump because those siphon pumps are sooooo slow.

I use this one and it can change a 10 gallon reseviour 2-3 minutes

One I use.

https://www.amazon.com/EcoPlus-Submersible-Aquarium-Fountain-Hydroponics/dp/B0018X2XT4/ref=redir_mobile_desktop?_encoding=UTF8&psc=1&ref=yo_pop_d_pd_t2

One I use in my tank as part of my filter:

https://www.amazon.com/Active-Aqua-Submersible-Water-Pump/dp/B002JPGE6S/ref=redir_mobile_desktop?_encoding=UTF8&psc=1&ref=yo_pop_d_pd_t2

As long as it's strong enough to pump water to your tank it should be fine. Stronger will of course be better for speed and getting water there. I happened to have first one because I had to replace it with second as it was too strong to use as part of my filter.

https://www.amazon.com/gp/product/B002JPGE6S/ref=ox_sc_sfl_title_1?ie=UTF8&psc=1&smid=ATVPDKIKX0DER

this is one I was looking at. Could this be rigged to attach to my garden hose adaptor on my wort chiller? If this works, I'm surprised some pumps are so expensive because this is $14