I was wanting to start another experimental tank. I don't know if you would define it as a true brackish tank or not as I don't plan to use true brackish water fish. It is all about "risk minimization" vs "risk elimination" which I don't believe is realistic or even attainable. The idea was to set up a low tech tank, and use aquarium salt consistently in amounts that would not harm the plants but be of therapeutic value to fish and possibly afford some protection against parastitic outbreaks. I was not looking at the tank as a substitute for good tank maintenance but just as something to afford greater protection to inhabitants.
It is said that : "Almost all aquarium fish can tolerate brackish water with one Tablespoon of Aquarium Salt per each five gallons of water. For example, all Livebearers, all Cichlids, all Goldfish and Koi, all Barbs, all Gouramis, and all Danios can tolerate this amount of Aquarium Salt. "
Source: Brackish Water Fish - Aquariums and Tanks at AquariumFish.net.
So, there appears to some flexibilty with choosing salt tolerant fish.
Now, that leaves the question of how tolerant plants would be to such a dosage. I heard that some plants can tolerate specific gravity up to 1.015 max.
Anarcharis, anubias, hornwort, java fern, waterm sprite, java moss, hygrophilia polysperma, are said to have this tolerance.
So, my questions, for anyone who has any experience with this are: (1) Besides Java moss, Java fern, and water sprite has anyone found other species that are more or less salt tolerant and up to what level. I am thinking of using 1 Tablespoon per 5 gallons. Can anyone confirm if 1 tablespoon of aquarium salt per 5 gallons results in a specific gravity over 1.015. (2) Is this even doable with respect to its effect(s) on long term healthy plant growth. I am more looking to tear a Natural Planted Tank that is not doing so well(not blaming the method; I just failed with the method and want to try something else) and replace it with this type of setup. Fortunately, I have all the plants and additional clippings from other tanks if I need them. I also have some Leonardite and Seachem Onyx left over from another project to use as a substrate for this project, so cost is not an issue.
Any suggestions/feedback would be most appreciated. Many thanks. P.S. I know that there are many people who may be quick to dismiss ideas based on what they think. Not to be rude, but I am only looking for feedback from those that have tried something like this, and have some experience with this kind of setup. No offense to anyone, but I am not looking for "I don't think it can work" responses. I am a man of Science. If you have evidence to back up your claims as to why you "don't think it can work," please post it. I am all ears.