My school's greenhouses have a lot of fungus gnats flying around, which damage many seedlings and plants that my classmates and I are propagating. So I'm thinking of putting a couple pots of sarracenia in there (although I'm a bit nervous if someone take them since I only have one of each kind). The thing is they use plain water for spraying among the flats. Is there some sort of cheap water filtration system to connect to the hose to water CPs and orchids? Maybe I just have to use one of those Pur pitchers to hand water them.