[nocus]

I'm a relative newbie to nickel plating. My initial attempts with the Caswell electrolytic nickel plating kit were quite successful but I can't live with the green chemical mess that the fine bubbles of the aquarium agitator makes around my tank. Another thread on this forum stated great success with an air bubbler that uses large bubbles without the mess and this is the route I am now going. I wish to submerge (permanently if possible) a Polypro (PP) tube with holes in it in my plating bath but my question is what materials can I use to weight it down and so sink it to the bottom? My initial attempts in a water bath were with stainless steel hardware (as a tester) but I understand stainless may/will corrode in the nickel bath. Though PVC & PP would be obvious choices I understand they will float in the bath. There is some indication that Titanium would be a good choice, but I'm not sure whether titanium will also eventually corrode as well.

So, can anyone suggest a material that will sink in a nickel bath that could remain within the tank indefinitely and not corrode or otherwise contaminate the bath? If the answer is no material would be good for this, would Titanium be my best choice as long as I remove it each time following a plating session?