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Anomalous anode dissolution in tin electrorefining

I am doing tin electrorefining research. I used to connected three Tin sulfuric acid tin baths in series. I used to get lot of deposit look like christmas tree, a lot of skimming during the melt of cathodes and few wet anode slime settled on the bottom. Since August, I run only one bath. The deposit on cathodes are more compact and produces less skimmings during the melt but I get a lot of anode slime which look like bone colored tin precipitate. I would like to know whether the anodic potential is higher by connecting only one bath than by connecting three baths?

Brigitte Peck Ki Laou
American Iron and Metal - Montreal, Quebec, Canada
2006

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