The original message is quite old

now I use a small pum to keep the liquid flowing around the fermenter, this set up I think keeps the temperature costant and helps the heat change between the water and the fermenter.
No starsan here in Italy so bleach is the only solution, but I think this is essential only for long fermentation like belgian beers, for a "normal" ale with 10 days of fermentation ( I do not use secondary fermenter) maybe bleatch is not really necessary if the water is continuosly mouved by a pump