I’ve read a good deal about water tank discussion over the years and disagree with large tanks (unless you’ve got a big RV someone services). My experience (…40 years+) of water tanks has come down to “What’s the easiest way to clean one?” If you get any water from a municipal or private well system that is not filtered to 1µm (1 Micron) you will eventually find a slimy film of material on the bottom of your storage container. How much is too much? I don’t know. But I find any a little disturbing. So I use 2.5G jugs with a 5” Dia. access lid and its own flip to twist handle spout. It's very easy to reach in and wipe around with some sort of cleaner. Another point is the convenience of carrying a balanced load (i.e., 2 smaller ones equal to 5G.) any significant distance from a faucet or a stream (Yes, I pump filter and treat the water). It's well worth it. Lugging 5 G. in a single container is doable, but I’m talking about preferences. So, easy cleaning, portable, and small enough to set-up outside on a table all make me choose the 2.5 Gallon container.
PS. I’ve bought 6 on Amazon that have been traveling for about 2 years -1 leaked. The good ones have small air valves in the wide lid. Whatever you do, don’t buy the cheapest ones. (That goes without saying, huh.)
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