I want to store ready mixed RO/salt in my 200 litre vat outside. What would I need to do if I was to do this? A Pump to circulate it and a heater on in it at all times? Or would I be able to mix for a while and then shut it down till needed and then stick a pump in again to mix it up n oxygenate the water up again add a heater n then put in tank? Also will this method damage the quality of water if left with no circulation etc?