If you've been to the water parks in Kusidasi, Turkey then Aqualandia is poor. If you haven't then it is probably good.
You get charged a lot for the lockers. You get charged a lot for the rubber rings. You get charged a lot for the Sunbeds.
The water is saline and it hoofs in places and as I have said in another post, I have walked out of better smelling public toilets.
If you want to swim withthe seals I would watch a show first as it looked a bit of a rip off to me.
Watch out on the rapids as it is easy to get knowcked off the ring and as people congregate you can get trapped under water. My duaghter was picked upon by some "foreigners" not Spanish, and she ended up walking back down the hill very upset for the rest of the day. As a watching parent you have no access or sight so rely upon the Spanish HSE but there probably isn't any..
By the time we wanted something to eat all the cafe's had closed.
It is best to take your own ring with you.
If you have little to compare this place with then it is good.