First figure out what is causing the rust stain or any pool stain to avoid having to retreat the same stain over and over again.
Ir rusty above ground vinyl pool.
I d go right over the seam where it joins too.
Rust stains and corrosion.
Where does vinyl pool wall rust come from.
Too much copper iron calcium or salts can all result in vinyl liner staining or marks.
Mineral and metal stains.
The most obvious problem with water leaking behind your pool liner is with the pool wall s finish.
Vinyl pools with rusty steel coping or rusty walls have a larger problem to deal with.
Looks like you have a pretty nasty rust problem there.
Rust or corrosion for those who have aluminum pools is an above ground pool s number one enemy.
If the stain lightens from a small application of chlorine on it the stain is organic in nature.
Above ground pool rust a variety of things can cause rust stains in a pool including screws nails staples hairpins or barrettes nonpool toys or rusty water pipes bringing in fill water.
Our ground is greasy black clay and the fine clay particles suspend in the air when it is dry then rain into the pool.
The main concern is that the corrosion developing on the wall can be sharp and can be a hazard for your liner.
The end result is a greasy black line about 2 inches wide around the pool liner.
I frequently have pool owners who ask me about rust.
I ve never recommended this for a steel walled in ground pool but for above grounds i have recommended sheet metal and pop rivots over the rust and then duct taping the sheet metal to protect the new liner when it s dropped.
Too much copper usually results in blue green staining while iron results in brown red or yellow staining.
While the walls in a vinyl liner pool may rust in almost all cases this level of rust is not enough to structurally compromise the wall itself.
Owners of in ground vinyl liner pools tend to focus their attention on what is most visible the enormous water barrier that covers the entire surface of the pool.
Anywhere that the liner is purposely cut there is a potential for leaks on both sides of the wall that can place water in constant contact with the wall.
Rust on pool walls can come from water weeping through a weak gasket on vinyl liner skimmers returns lights and steps.
But the people who build the structures understand that what s under the vinyl is just as important to a successful pool installation.
We get ring around the pool every time it rains.
Rust can be an eyesore flake into the water cause dangerous sharp or jagged edges and eventually causes the pool wall to split open.