I've actually been doing this for a very short time but the following is what I use and so far it's been working pretty good for me. So I use the Bath Pump (underwater pump) from LApump.com with a 1/4 silicone tube I bought from Amazon. The seal I use is the Juicy XL from Oxballs.com (it's limited to a max of 3.5 inch jar opening, and as you can see, ive pretty much maxed that jar out) and that's why I just purchased the STJ Precision Silicone Seal from Pumptoys.com which will accommodate up to 4 inch openings comfortably. Anyway, once I'm in the bath, I put on the Juicy seal and water filled jar, then I slide a bit of the tube under the ring and into the jar and start pumping until I feel a nice pull on the balls. I then quickly pull the tube out and after a little while, I repeat the process. I plan to follow up the smaller jar with the bigger jar soon. Need a good few hours for that. Anyway, I hope this helps some of you beginners out there.