From http://www.swimmingpoolsteve.com/pages/pool-plaster.html - Steve talks about what would cause the plaster interior surface in your pool to turn green. Once a plaster turns starts to age it will become more porous which will allow bacteria and algae to hide from the chlorine and brushing that you do to your walls. While you could acid wash the pool, this would only serve to make the problem of the plaster being too rough even worse. ... https://www.youtube.com/watch?v=ZaMsFNM_2Sw

http://www.SwimmingPoolSteve.com - If your pool filter has a leak from the band clamp around the body (or around the filter head on sand filters) this is most likely a result of the clamp not being tight enough. Just to make sure there is not another problem it is a good idea to take the clamp off, inspect the O-ring for debris or sand, as well as lubricating the O-ring with a silicone based lubricant made for pool and spa applications. If this does not resolve your filter leak then you need to take a rubber mallet and tap the clamp all the way around the circumference of the filter and then try tightening it again. What you will notice is that tapping it with the mallet seats the clamp a little tighter to the filter body and you can now get a few more turns out of the clamp. This will usually resolve the leak problem. If you discover that your filter is broken and you will need a replacement be sure to read the pool filter review and buyers guide from Steve here: http://www.swimmingpoolsteve.com/pages/filter-reviews.html ... https://www.youtube.com/watch?v=s-Ctjrof2dY

http://www.SwimmingPoolSteve.com - If you have foam in your hot tub this is usually a result of the hot tub filters being dirty. Hot tub filters are made from paper and the become saturated with oil (sweat, makeup, lotions) when they get dirty. This results in foam when you turn the jets on. Many hot tub companies will tell you to use an "anti foam" product which is simply a liquid silicone that reduces the surface tension of the water. Also hot tub owners are often told to increase the calcium hardness of the water since soft water will promote foaming. While both of these tips will help to reduce the foam they do not address the reason why you have the foam in the first place. In most cases the hot tub filters are simply dirty and need to be changed. If you would like more information on hot tub care from Steve you can find this here: http://www.swimmingpoolsteve.com/pages/spas.html ... https://www.youtube.com/watch?v=jeQ8FXIH5rM

From http://www.SwimmingPoolSteve.com - Swimming Pool Steve talks about why you could have sand in the bottom of your swimming pool as well as some of the tell tale signs of having a broken lateral in your pool filter. #swimmingpool #poolfilter ... https://www.youtube.com/watch?v=zvrj8_V_G4Q