second hand tank cleanig what to use

[Frankie B]

Hi can any body tell me the best way to clean a second hand  ibc water tank,  they tell me it only had water in it previously but it has green stains on inside . what can I clean it with,  with out affecting  the tds of new water that's to be stored in it many thanks Frankie ,B

 

[Dave B]

Pour a bottle of bleach in it and some tapwater and give it all a good slosh about

Put the lid on and turn it over if you can so it all gets clean

Rinse out well with tapwater after

 

[Frankie B]

Thanks I will give it a go.

 

[Dave B]

Cover it from sunlight once clean or the green algae will come back

 

[Frankie B]

Thanks Dave its going in the garage as a storage tank so will be out the light . many thanks for your advise wish you well  Frankie , B