Can I use tap water for my pleco tank?

nope will work just fine as long as you use conditioner, mine do quiet well in in plain old tap water.

Hell yeah! That's one of the greatest things about keeping freshwater fish. Anything goes wrong, just open up the tap and change out the water. For a couple weeks, I was seriously researching a saltwater tank and growing coral. The ONE thing that finally turned me off on the idea was NOT being able to use tap water for water changes. I found out you pretty much need an RO filter at your house and need to wait on enough to collect before you can do a water change.....nah, I don't think so.

I have an InstaPure Water Filter attached to my Kitchen Sink. I use the filtered water for my water changes, and have found that I don't need to add any chemical treatments to the tank. The parameters for my filter water seem to be perfect with my water testing kits. So, the only treatment my water actually gets is from the charcoal and biomax that are placed in my Fluval 406 filter. I do tank cleaning (water cleaning/changes) once a week, and the filter elements once a month. Sometimes I skip 1 week on the tank cleaning.