I would focus primarily on the words 'Castle & Gym' to form strong mark for the logo. The pool part is a bit trickier, and a bit unnecessary imo. Think of the words 'Pool', 'Castle' and 'Gym' - 'Pool' just seems like the odd one out. Plus most reputable gyms nowadays come with a pool anyway, so it's not like its a USP.
Keep it black and white for now. A few points from me;
It has a very tall and awkward footprint
The plus symbol has flaired edges which makes it not look like part of an equation
Not a fan of the lowercase 'C' and use of Helvetica here as it lacks and feeling or style.
t's quite literal – GYM + POOL. For me, "Castle" should be the focus. It's a distinctive name for a gym/fitness centre.
Can you drop the plus symbol and bring the other two elements together perhaps? I'm almost seeing the distinctive top of a castle turret in the 'weight' mark, and combining that with the water, you could form a 'moat'
Or can the weights look more like a castle with the water forming the moat? Then you have castle, gym AND pool covered
Paul, your the first one to pick up on the castle turret that is left behind with the Dumbbells , plus sign and the pool arranged in this way. Will revise chosen typeface. Plus/and sign also makes the window from which archers would defend the castle.