New To Freshwater

[Madreefer]

Kinda feel stupid for asking this. A business asked me to take over the maintenance on their freshwater tanks. I'm a saltwater dude for quite a few years. I no nothing about freshwater as in water parameters. I plan on doing the regular filter cleaning and water changes with RO water but is there anything I should be concerned about as in the water parameters. In my mind should be a bit of a cakewalk compared to salt.