You can not repair holes in sand filters made of any material. It would be safer for you to shut the system down at once. It would be best to replace that filter at your earliest convenience. You run the risk of having that tank expand and blow. Even with only 8 to 12 of water pressure inside the tank that combined with any air that is trapped within the tank could be deadly. At a minimum you could end up with broken ribs or have an eye damaged with a fragment of the tank. If you are fortunate enough to actually have a tank that separates in the middle and the portion of that tank that is damaged is the top half then just replace the top half if you can find either a new or used one. If it is the bottom half --- don't bother -- it would be cheaper to buy a completely new filter. All others are of one piece.
Ken
If the crack(s) are small and you have determined that your pool is not loosing water then leave the cracks alone. If the crack is sufficient to make the pool loose water ( determine that you are actually loosing water with a bucket test) the crack can be sealed with epoxy putty, fix-leak, or hot epoxy. It takes a specialist to determind just how much of the crack needs to be reworked.
One of the lateral returns inside of your sand filter may have snapped. When that happens, it can send sand out of your returns. Have your local pool place repair your sand filter.
look at the filter if theres a hole well there you go that's the sign
Nothing if its a sand filter However if sand is coming into the pool from the filter then you may have to replace one ore more laterals in the sand filter as they have worn and are letting sand through to the pool,
If you have a sand filter the laterals in it may be starting to show signs of wear these wil blow sand from the sand filter into the pool when they wear out.
Other than the wind blowing, nothing. If you cannot get rid of sand in your pool, it is most likely a filter issue. If you have a D.E. filter, and all the grids look good, check to make sure the manifold has a good seat. There is also a small "filter" on the top that may have a hole in it, if its crushed that is most likely your culprit. If you have a sand filter then you most likely have a broken lateral (a small line in the bottom of the filter that screens out sand) The only way to check these are to remove the sand and visually inspect all the laterals. Tritonunderwater.com
It could damage the internal PVC of the filter and cause sand to get in your pool.
The sand filter wont make a pool green this happens a s a result of algae.
If dirt returns to the pool while you are vacuuming, it means there is a hole or broken item in the filter. If filter is a cartridge filter the could be a hole in the cartridge. DE filter, hole in filter fabric or broken plastic manifold. Sand filter - broken plastic fitting maybe.
If you are getting sand coming into the pool and have a sand filter you may have to replace worn laterals in the sand filter.
No.
Yes, it just depends on what kind of sand it is
Your filter will tell you on the side of it how much media sand to put in it.