Recently purchased my first house with a pool, and been using this site a ton trying to learn as much as I can. So far so good in keeping up with general maintenance, but there are a few things on the walls/floor that I'm unsure how to remedy.
Pool is appx 16,500 gallon gunite. Has raised spa with waterfall. I run a Polaris 280 for a few hours daily to clean the gunk off of the pool floor. I'm probably at least a season or 3 away from having to re-do the plaster as there are some areas of pitting where dirt likes to rest inside of. Mainly in the spa, but also on the steps into the pool.
My issue is there are some stains that I'm not able to identify. First, a dark ring about around the entire pool. Not at the waterline, but closer to the ground of the pool. Brushing does not remove this (with regular or metal bristles). From my reading that should indicate that it isn't algae. I've found that one of those pumice stones does seem to be kind of effective, but I'd probably have to go through 10 of them for how quickly they dissolve! I'm not sure how/why any kind of dirt would be 2-4 ft below the water line and get so stuck to the wall...
Next are some small orangish stains that look almost like you dropped quite a few rusty nails on the floor. Never more than an inch long. Sometimes grouped in clusters.
Finally, what looks to be some kind of bleach-like stain. Almost like some liquid got poured into the pool and kinda sat at the bottom. This one I'm sure if I can clean/remove, as it seems like it's actually ate away at the surface of the floor. Sometimes when a decent amount of dirt/sand has gotten into the pool, it'll actually hold the dirt.
Attached pictures of all. Would welcome any recommendations! Or if there are any other questions about the pool I can answer.
Thanks in advance!20160516_112105.jpg20160516_112114.jpg20160516_112134.jpg20160516_112254.jpg