Can the supercarb, ultracarb or the imperial ultracarb be cleaned so that it can used again ?

I noticed on this link it only shows the 1 cartridge that can be cleaned. http://www.doultonusa.com/HTML%20pages/ceramic_cartridges.htm#DOE

The flow rate of the ceramic filter can be easily renewed by simply brushing its outer surface with a stiff toothbrush, plastic brush or soft scouring pad under running water. As the top layer of ceramic and the contaminants are brushed off and flushed away, a new layer becomes available. With the Sterasyl candle/cartridge this process can be repeated over 50 times and or when the diameter of the slimline element reaches 1.75/44 in./mm. Supersterasyl, Ultracarb and Supercarb candles/cartridges should be changed every 6-9 months as their carbon media will get exhausted sooner than the ceramic.
For more information please visit the following link: http://www.doultonusa.com/HTML%20pages/cleaning_candle.htm
Imperial Ultracarb lead removal capacity is 2000 gallons.

I have a doulton filter fitted with "stearasyl" candle.

I tried to see some tests made on this candle on your web site but its only

available on "superstearasyl", "ultracarb" etc and not on "stearasyl".

Aside from removing bacteria...

Does this stearasyl candle also

1. Improve the taste?

2. Remove chemicals like, chlorine and chloramine?

Sterasyl candle is for microbial removal only. Organic chemicals are reduced with the carbon inside the Sterasyl such as Supersterasyl in gravity mode or Supercarb and Ultracarb in pressure filters.