Yes, I agree. THINK people, THINK
Which is exactly why I stated the following in the sticky:
Please Note - If anyone tries this in their tanks, please make certain that the products are 100% organic, biodegradable, and non-toxic, and do NOT contain any types of surfactants, perfumes, etc.
and ......
As demonstrated in the various products in the following link, the Bacillus genus is the main bacteria family used in septic tank formulas.
http://www.bio-cat.com/products
It is also the main *probiotic* bacteria family used in aquaculture formulas, including probiotic fish food formulas.
With regards to growth performance, immune response, or out-competing pathogenic bacteria via competitive exclusion, as stated previously the science is still in its infancy - and could be highly subjective to species, as well as the growth stage of species, etc-etc.
That leaves us with improving water quality (by increased waste reduction), which again places the bacillus genus of probiotic bacteria as #1. So while one may never be privy to the proprietary information regarding most of these various septic tank products, it's safe to say that the vast majority of them will all be based on the Bacillus genus of *probiotic* bacteria, with a few in-house tweaks & twists with some of the various septic cleaner brands.
The main thing is using a product that is 100% organic, biodegradable, and non-toxic. That doesn't mean that you should feed it to your dog, or dump the contents of 10 packages into a 5 gallon tank full of guppies.
I also posted a number of links, which explain in great detail the conclusions that those in the aquatic scientific community have made in regards to these exact types of probiotics.
I personally do NOT use Rid-X, and never have, nor have I ever recommended its use, but I do have close friends that use the exact same probiotics that I use (designed for ponds, and locally manufactured) in their tanks, that contain black rays, asian aros, and many other exotic species, and over a year later have not experienced a single negative issue.
One again people jump to the wrong conclusion ......aka cognitive bias at its most egregious.
Which is exactly what you did when you jumped to the conclusion that RidX caused the death of your friends rays.