Thanks @brakan it was very beautiful! My daughter was very upset that she couldn't play in the pool longer but I couldn't let her freeze lol...would have made more sense to make that the ONLY heated pool!!
The submarine safari was so amazing...they had the divers go around to each window and wave to the delight of the children and one of the divers even held up a happy birthday sign for one of the children which was so thoughtful! You can find the prices here: http://www.submarinesafaris.com/booking_lanzarote.php