Yes ive just read that Dave .... And ....
Where's it say GG4
On my kids lives ive never used or seen it .
Again I'm baffled .
Ecover was very goid , but come summer and impossible to judge how much was in the tank it was proved to be very poor in hot weather and if a build up in your tank was poor .
Vision has overcome that above point .
It's good that you've come across GG4 , but don't mis- quote me as it's unfair .
I'm pleased for you Dave Willis if this works for you , I won't be saying anything negative as ive simply never used or tried it