Is it algae? - pictures included

[Van down by the river]

Hey Walter,
Don't waste your money on Red Slime remover as what you have is a red macro algae species, not red slime algae which is actually a kind of bacteria.
The Red slime remover if used properly works very well, as long as steps are taken to correct the water quality issues that alowed it a foothold in the first place. As it sounds like your tank may be relatively new (less than a year), expect a few types of algae blooms.