I like about 1 cup sodium carbonate per 2.5g of water, but it all depends. the more electrolyte, the more juice CAN flow.. you can max out a charger fast.. if it is a 10a charger, sometimes I weaken the soloution a lil.. as it may overheat the charger as the load never tapers off like it does on a battery, where, as it charges up, current goes down.. on electrolysis, current stays up. on a lil charger like 2a.. give it plenty of mix to make sure the electrons move good.
also.. anode number and placement ( line of sight ) is important. the more anodes the better.. and the closer they are tot he work piece the better... however if you only have a couple anodes.. don't get them too close as some of the part won't get hit.. alot of anodes? and you can get them close.
also.. hardware cloth wrapped in a loop on the inside of a 5g bucket makes a great anode.
anode is positive
work piece to be cleaned is negative.
keep the charger clamps out of the mix, as the positive one will erode.
A 'dumb' charger works best. a modern anylizer one usually won't put out power if it does not 'see' a battery... though you could perhaps trick it by hooking a bat in parallel to the charger and the mix..e tc..
for a medium bath.. ie.. 5-20g 10a works great.. have doene 10a on a 50g tank too.. works ok.
smaller than 5g.. 1-6a is fine.. more amps = faster.
you can parallel 2 chargers.. ie a 6 and 10 = 16
set em to 12v.. etc..