I have not heard of it being done before I have heard of fiberglass conversions however
Swimming pool types include above-ground pools, fiberglass pools, vinyl-lined, gunite and poured-concrete pools. Learn the pros and cons of each type of pool.
The in-ground pools are prefabricated. The bodies are made of fiberglass-reinforced plastic. This is an alternative to vinyl-lined, gunite and poured concrete pools.
All day long. Concrete pools have real tile instead of the fake liner tile look. You can update a concrete pool later on as styles change: with vinyl it's final.
u can NOT convert one into another.... ud have to rip it out and start over... either gunite or fiberglass
If you are talkin about a vinyl lined pool the answer is yes you can.
The gunite pool is basically what most people refer to as the in-ground concrete pool. Because this pool will shape to the contours of your yard, it is a great choice for those who want something more unique than the typical vinyl lined pools. The tile on the gunite pool can be cleaned with household tile cleaner when you are doing your deep cleaning of your pool. This requires that the pool be drained and rinsed thoroughly.
for in-ground estimated costs are $7,000-$16,000 for a vinyl-lined model, $15,000-$25,000 for a fiberglass shell and $17,000-$45,000 for concrete or gunite. But, custom designs can run prices much higher.
An inground pool is typically lined with either gunite (concrete), fiberglass, or vinyl. Gunite and fiberglass are roughly the same cost, whereas vinyl is considerably cheaper. With the lower price comes less durability, as vinyl lining has to be replaced every 8-10 years or so, whereas the other two can last for decades. Vinyl is also much easier to puncture or otherwise damage. That said, many people still prefer vinyl inground pools due to the lower cost.
If it was working ok before you lined it and you have no problems removing the liner you should have no problems.
That last answer was not very helpful. Installing an aboveground pool can cost $1,500-$5,000; for in-ground $7,000-$16,000 for a vinyl-lined model, $15,000-$25,000 for a fiberglass shell and $17,000-$45,000 for concrete or gunite. However, custom designs can run prices much higher. source: costhelper.com
Gunite is a type of cement mix used in the walls of the pool, whereas a vinyl lining is just a layer on the walls, generally used for waterproofing purposes. So, either of them will do, but my personal opinion is that using a lining is always better (hence vinyl lined pools are very common in England and other countries)
The average cost of installing a medium-sized concrete/gunite in-ground pool is roughly $30,000 (in 2004) with no frills (such as waterfalls, flagstone, inlaid tiles, etc.). That depends on whether you are willing to take the task on yourself or whether you'd prefer to hire someone. We saved thousands on ours by doing it ourselves - thanks, The Windsor-Browns You can also save alot on the cost by going with a vinyl lined inground pool.