If you want to improve strength you can try split fins and or the gloves, I have just ordered some. Seen people down the local pool today with them and seems quite a standard training aid.

I particularly want the split fins to help build lower body/abs strength. Tried out my new Aqua Sphere goggles absolutely the business, decent pair no water in the eyes, fantastic.

Just recovering from injury myself and this was my first time doing any real exercise in a few weeks and it felt good. Check out the deals at the pool I managed to buy a monthly pass for 20 CHF which as I plan to go most days is a bargain.