Hi ..I am new to this site. We have an IG pool 12 years old. We hired someone to install new liner. All was well and when water was just above pool light -- we turned on the pool light....YIKES....the pool floor looks like the moon. Our floor previously was very smooth. We had a few divots and requested that he fill them. Our floor is vermiculite. We contacted him and told him of the problem. He told us he used sand and cement to fill with. We email pic. to him showing where we can see boot prints (never had that before). We still owe 40 % of job....(thank goodness). I feel certain he would not come back but for this. He says he can reverse and blow the liner up and get under there and correct this. He is very angy and said that his price did not include doing whole floor. I agree....the floor had no issues prior to him. He acknowledge on last visit that floor look good prior to installing liner. I do not understand how this has happen. I just know that it is unacceptable and I know problems will arise when vacuuming...and standing on these lumps. I would think that it would damage the liner also. The liner is less and 2 weeks old. It looks so bad there is no way I can live with this for the next 10 years. I feel (I am not a professional) that it would be better to take as much of liner out as possible - scrap out his sand/cement mixer - and refill / trowel with vermiculite. Maybe even take a board / or level and screen it off. I hope you know what I mean. My husband and I could have done this but we did not have the time. I hate that this has happen and hate to have him back out as I now don't trust him. When blowing the liner up by reversing the air on vacuum...would this not put stress on liner where it is attached to return jets, polaris jet, steps, light etc. ? Have you ever heard of this method to fix? Would this be an acceptable way to fix this seeing how he may have to remove what he put down and fix with correct pool base? I would so appreciate some feedback. Thanks in advance.