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Dont you have to have a good feel for tanks before you do this? I have had tanks since I was 5 (Red eared slider) But ive used test kits since I was 12 or soNic;2658979; said:yup.... i even cycle tanks with no test kit.... like i said waste of money.... i have no need or use for one... throw it away and stop worrying about params just do your weekly water changes