@jespah,
Saltwater pools still use chlorine; they just use chlorine that the system disassociates from the sodium in a salt molecule.
But I don't quite get how traditional chlorine promotes the growth of algae, either.
Both systems provide protection against algae, but buying supplies from a pool supply place is very expensive.
You can buy the exact same chemicals from a grocery store (in a different concentration) for a lot less.
The biggest problem I've seen with home pools is that people keep adding the chlorine pellets that have the stabilizer included. The stabilizer builds up, and the chlorine eventually evaporates. You end up with way too much stabilizer, and the pool isn't as enjoyable.