Title pretty much says it all.

What kind of water do you guys use for mist kings sprayers? Should I just use tap water and consider assume I'll need to frequently clean/change the heads? It just seems like a tremendous amount of distilled water to buy on the regular. Guy from my local fish store recommended hooking up a brita-like filter to my sink before potentially doing so, and I guess that would help.

Just looking to figure out what the majority of people out there really do.

Cause filling up a 3x 7 gallon buckets with distilled water I buy from my supermarket is insane.