has anyone ever used a tap water purifier to lower ph and gh and kh? my tap water comes out at a ph of about 7.5 to 7.8 gh 4-5 and kh about 3-4 I used a pur water filter i had laying around and tested the waters after using it.. ph 6.5 tp 6.8 kh and gh both went down to 1 to 2! anyone else have luck using these? does the filter take out any needed elements that i might need ant not know about? if not im off to start some taiwan bees !