narrowboatworld

You could use scale away.  It is poured into tank and left for couple of hours then pump out.....worked fine on my 18 yr tank

http://www.leesan.com/index.asp?m=3&cat1=35&cat2=44&p=120&t=LeeScale%20Bio-Degradeable%20De-Scaler%20(1%20litre)

best wishes

Hi,

     I wish to fit an inspection cover into my 500l tank, which is obviously under my bed. I would like something around 30-40 cm in diameter with possibly a screw thread. I have sediment collecting there after a year of little use, causing a listing problem. Does anyone know of a supplier ?

                       Many thanks Martin.