I've used and like both of the above products. But for all the uses I have both become cost prohibitive and required me to go the DIY way.
I use AtlasNova's CSG-1. Nice, top quality, little kit.
It's is meant for creating 8-12 oz at a time, but I have no problem with it making a quart to a quart and a half per batch.
The instructions are not best, as they were written by the inventor. Engineers should never write user manuals!
The darn thing works and it works well. I make almost as cheaply as water.
The Great Ag
For those in Australia, look for Silver Well. The Silver Well is the Silver Puppy licensed in Australia. It makes very good colloidal silver very reliably and simply up to the 15-20ppm range...much stronger than most of the commercial products you buy and at a fraction of the cost. Hands down the most bang for your buck in an "automatic" colloidal silver generator.
I've also purchased a commercial set up from Atlas Nova that can easily produce 20 liters a day of the absolute highest quality colloidal silver available anywhere, but if you only need to supply a couple of families the Silver Well/Silver Puppy is the way to go. I can't imagine why anyone serious about colloidal silver would buy it when making higher quality product right at home is so easy and SOOO much cheaper. Both vendors I've dealt with, Atlas Nova and Silver Well Australia were a pleasure to deal with. Both spent time on the phone with me getting me started and customer service was more than excellent. I highly recommend buying the TDS meter (COM 100) Silver Well sells and learning how to use it. Atlas Nova's lasers are unbeatable....in my opinion you need both.
I use Silver Biotics and works great for me, I like it because they say the concentration is the right one and you won't need to stop taking it as with the other brands.
Colodal Silver is a natural antibiotic but for bets results you will need to start taking it at the onset of the symptoms, have a good luck with your ear!
I discovered colloidal silver when I used a dog ear product that had it as an active ingredient. I am going to try it for some other things. I am not a do it yourself kind of guy, so making my own is out. Can anyone offer me any feedback on this supplier? purestcolloids.com