New I.G. pool installed last year, steel with vinyl liner. bottom of pool was smoothed with a sand/portland cement mixture that hardened- looked like a fairly thin layer. Several spots on the pool bottom feel as though rocks or other pointy objects are pushing up against the liner on the pool floor. Is this normal, or is this something to worry about? I believe I have a 5 or 10 year liner warranty, but would still like to know what is causing this. Thanks.

I am looking to purchase a friends hot tub and I can not find anythign on it. Brand - Streamline Spa Model - Thoroughbred Model number - 1900 I can not locate an owners manual or even a phone number for the manufaturer. The hot tub was made in 1997. I have some questions regarding it. 1) can it be drained and transported without it laying flat? It is a short trip and I was thinking of using a full size pickup but it would stick out on the side of the bed and have the tub on an angle. 2) can just the foam in the cover be replaced or must one by the whole cover? The foam is cracked on the one half. 3) there is a cap in the center of the one top edge. It looks like a little white mini tire from an RC truck. it is not on level right now and so water is leaking from it, but it stays in teh tub. Any clue what this is? At first I thought it was a cap covering where a small fountain of sorts would go 4) is there a good resource site out there on the maintenance of a hot tub and the chemicals needed? There are tons of sites, but to the noob, it is tough to know which are the most reliable thanks in advance for any info anone can provide