Hi Guys

I have a dilemma
I want to use some salt in my pond BUT.......

All my local suppliers ie: Aquatics Centres have a product PDV (pure Dried
Vacuum) Salt
This has Anti Caking agent E535 (Sodium ferrocyanide)
They are ALL totally adamant and swear they have used this product for 20+
years with no problems
Several of these suppliers have Very large stocks of BIG Koi in ponds with
this salt added..
BUT According to several web sites I have looked at ie: www.puregold etc
They say NO to this additive as it turns to Cyanide when used........


What should I do?

Chris