Quote Originally Posted by CrazyHedgehog View Post
I use washing up liquid and an old toothbrush and rinse thoroughly...and rinse again!!

When I do a full tank scrub, I use a mild bleach solution, (literally a splash in a bowl of warm water) but again, I rinse thoroughly and rinse again and finally wiope down with a hot damp cloth and dry before resetting tanks.
I little more description please. That sounds like hand soap to me.