Ive always used Jungle 6 in 1 tests strps but i often question their accuracy. i test my water about once a week or so. (is that too much or too little?) and want to know what the most accurate way to test my water would be. ive heard mixed thoughts on liquid tests but i like the results i get from my ph one. is there a good multi pack to test everything in my water with? my 55 gal tank currently has one 6" pleco, one 5" catfish, one 2.5" catfish, one 4" Jack Dempsey, one 4.5" oscar and 4 redtailed barbs. temp kept at 76ish ph at 7.0, fluval 304 and under gravel. also can i use my canister as a gravel vacuum???