methinks it will be cost effective in the long run to install a r/o system. if you "T" off after the filter and add a mineralizer after the "T" to a sink faucet, you'll have fantastic drinking water to boot for drinking, cooking, etc..
i understand priorities and money constraints, etc. ... but something to do when the availability arises in the future.
i know i'm getting ahead of you, here, but since you've caught "the bug" for plants that like clean water... assuming you'll increase your collection over time...
here's the unit i have...
https://www.firstrays.com/cgi/cart/....207&product=RO_DI!Systems&pid=1401&keywords=
i grabbed the 5 stage 100gpd unit. comes with faucet and pressurized holding tank, so it's a complete under sink system.
later i added the mineralizer...
https://www.firstrays.com/cgi/cart/...7&product=RO_DI!Components&pid=1405&keywords=
with that i added a
john guest slip "T" to divert clean water before the mineralizer and a
1/4" slip ball valve to fill my reservoir for my terra. on my reservoir i have
this bulkhead already from my misting system... so i just plug that, bring it down to the kitchen, put it under the sink and feed the line in there for filling.
i must add that there are way cheaper "T"'s, ball valves and probably bulkheads for your system/reservoir, but
this tube cutting tool for cutting the tubing is practically invaluable during installation. on the back it has a little tool for releasing the tubing from the slip connectors should you feel the need for moving things around such as i do for filling my reservoir. i sure wish i had that with me when i set up my dads r/o unit. :swear: