I need advice please

[Whiskey]

Thanks for the advice on the skimmer and the sand.

The water conditioners would be stuff like charcoal and/or other additives, a buddy of mine has been reefkeeping for many years and he was saying he uses a few additives (I can't remember which and he's in Hawaii ATM so I can't ask him) that really seem to help his reef's health.

If the inflow is greater than the outflow then there won't be any flood issues, right? The tank will only fill the sump as the sump pumps out enough water to fill the sump... Or, is it all an issue of exact balance? Is the safety aspect of a seperate tank that there's sufficient room for the potential overflow?

I really don't want a wet floor.