I put together a 2 1/2 gallon thum cell to refine silver in. Ive got a stainless steel sheet on the bottom, which is bent up the side to make negative connection. I placed about 100oz of 98-99% pure silver in the anode basket with muslin cloth. For my candlestick ive just got a 10z bar of silver with a sterling silver fork handle coming out of the top. For my power I bought a 25 amp plating rectifier. Ive tried setting in on about 3.5- 4 volts, but the amperage and volts do not register on the rectifier when I hook up the positive and negative, so I do not know what is actually going through the cell. As for my solution I did 4 oz copper per gallon and 6 oz fine silver per gallon. After nearly 4 hours all I have is a thin layer of crystals with no build up. It seems after 2 hours I really havent had much more build up at all. Forgive my complete ignorance in this matter as I am new to silver refining, but what could be the reason for my very little growth in crystals?