Heating harvested rain water

Can you give us more detail regarding location and use?
Having the tanks on the north side of a building, depending on climate, might not work well at all. Get some sun on them to provide warmup. Can you put some bleach to retard algae? Our black tank does not have a problem with freezing (or algae) but we get a good amount of sun here.
I have lived for 10 years using a 375 gallon translucent potable water tank… with a 12 volt pump to feed the RV…..spring fed, gravity filled… very cold all winter in the mtn… air temp below zero many times …spring never freezes….the tank is in a small shed with a radiator space heater and a small fan keeping the heat moving…

… 500;watts..x 24 hrs = 12kwhs per day x .15 cents per kWh= $1.80 per day = 54 bucks per month…temp stays about 40 all winter.
Cheap for all the water one can use…
It has never froze ..

as far as slime or bacteria if you add 12 drops of normal Clorox per gallon , if you use it rather fast that’s even better…
( not old Clorox but new and full strength) you will have safe clean alge free water even if it sits along time. . It’s in all the survival books .. Clorox kills viruses and bacteria and etc….and is safe for humans in these doses … it’s what citys use , dirty city’s use a lot more.

Clorox only lasts about 6 months and then diminishes in its strength…google it if needed to learn more.
hopefully you should have a reasonably clean source to start with… you always need to be able to slightly smell the Clorox in the finished water after about an hour or you didn’t add enough for that particular batch of water.…it’s smell and strength is diminished by how much was utilized to kill stuff…
but don’t add to much… yuck…
we have all grown up using it In our water…It’s not experimental and it’s cheap .
good luck…
J.
 
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