I use a water container I bought at the fish store. It holds 5 gallons and has a screw on lid and flat sides that the bulkhead fits nice and snug in. I use tap water and I found in 2 years now I had to clean out the nozzles for the 2nd time today. The first time I used CLR and today I used a nozzle cleaning liquid made for misting nozzles. I bought it at home depot in the misting area and I have to say this made my 2 year old nozzles flow like new again. Just let them soak for 30 mins. in it and they are done.