Homebrew PCBs

Mark Lerman wrote:
> I don't make a lot of boards, and most of them are quite small, so 
> I've been looking for a simple, fast way to etch. After experimenting 
> with a few suggested recipes, I use a 1:1 ratio of  muriatic acid 
> (31.45%) to 12% hydrogen peroxide. 
It's been 60 years since Chem 101, and I don't recall  - do I add the 
acid to the H2O2 (water), or the other way around?
Also - someone mentioned a magnetically coupled aquarium pump for liquid 
agitation.  Is this an easily found item?  All I've seen in pet stores 
are the air bubbler pumps.

Norm
W6NIM