My wife, two friends and i visted the Aqua Parque last week (wed 20th sept06) and really enjoyed all the rides, the dolphin show etc.
In fact we enjoyed the dolpines so much we all booked to see them close up the day after. Well worth the £35.
The downside was how much everything was. We paid 23 euros pe couple to get in, then the beds were 3.50 euros each. To get your own inflateable ring for the water slides was 7.50 for a single ring or 9 euros for a double. Then the food was crazy, one woman must have paid 67 euros for food for her family (£40 ish!!) Then if you wanted to you could buy photos that are taken on entry and even during your time there.
So make sure you set aside 85 euros per couple (approx) and you wont have any surprises.
We really loved the place (it was my first time to a water park and to see the dolpines). Hope you enjoy it to.
Bob