Hmmm...I just saw what you wrote about wanting to grow coralline. To sum it up, coralline will grow when your calcium and alkalinity are at sufficient, stable levels, without any other effort on your part. If coralline is not growing anywhere, I would say your levels are insufficient and/or you have an ionic imbalance in your tank. If you want to boost the coralline growth, Seachems "reef calcium" is a fantastic additive for doing so. Use it cautiously though, as it is a gluconate based calcium and can fuel nuisance algae blooms if overdosed. Make sure your alkalinity/etc. is sufficient before you dose it though, as it will not do much for coralline growth in the absence of proper biomineral content.
Kalkwasser precipitates phosphates and improves skimmer performance, so yes, it does help battle nuisance algae, as you stated.