Last night I had this dream that I was breeding saltwater fish to live in freshwater habitats and vice-versa...And I was making so much dream money. I was the hottest fish store in the country.
Then I figured I'd see if something like that had ever been done before so I googled it up this afternoon and came up with this...
I've seen some water treatment that is supposed to make this possible, along with Youtube videos of it in action.
Whether the fish are really healthy in such an environment is anyone's guess.
Last time it came up, someone also made the point that saltwater fish are more aggressive and territorial, and will probably end up bullying the freshwater fish.
This sort of thing seems to get "inflicted" on the aquarium community every 10 years or so, and this is the latest one. I can remember at least 2 previous products that were marketed to let you keep FW and SW fish together.
What is done is to keep the water somewhat brackish. Most SW fish will take a SG of about 1.011 easily, and this is often done for disease treatment. Many SW fish can take even a lower SG. Normal SG for SW typically about 1.025.
Sometimes additional chemicals to lower stress with the fish.
In my opinion, this doesn't seem to work long term. It's too much stress on the fish. Note that all the fish shown in the picture are extremely hardy. You didn't see any catfish or loaches that are very sensitive toward salt. You also didn't see any demanding SW fish either.
I admit that I am a sceptic when it comes to "nanobubble water".
^Along with that, golds are very salt-tolerant, thus why it was able to be in that pic. I once saw a saltie octopus chasing around a feeder gold in a saltwater column tank. Took the octopus awhile to catch it, because the gold was doing fine with the amount of salt in there. I imagine you could acclimate some freshwater brackish species, or cichlids to a low salinity of saltwater, with saltie fish that already are okay with the low salinity, but I think it'd be unnatural.
Or you could stick some baby bull sharks in an estuary setup with a brackish fish of your choosing, but my money's on the shark. Stick a manatee in there too while you're at it
My family has a large pond/lake that is connected to the neighbor's property. The neighbor used to go fishing in the Indian River (brackish river connected to the ocean) and he would throw his leftover live bait into the pond (cruel, I know..). To this day there are schools of mullet and greenies in the pond and there used to be sheepshead and snook before the 2004 hurricane season. They've grown from little babies to full grown adults in there.
I guess since they were already used to brackish, the switch to fresh wasn't so bad...?
They supposedly do everything from killing germs to allowing salt water fish to live in fresh water (the bubbles somehow mimic the saline quality in fresh water without harming freshwater fish).
I have seen a fish store in vietnam, they have bunch of clown fish in a fresh water display tank with some sort of moss and java fern. I was like... wth, i asked a lady who works there but seems like she doesnt know !@#$ anything. BTW, those clown fish are not for sale
i tried to raise goldfish in my saltwater tank too, but they seem to not live for more then 5 minutes,my lionfish always get to them and they always become lunch for him.:icon_mrgr
I've seen this in person. What they do is keep the salt content to a minimum to keep the clowns alive and slowly get the goldfish used to the salt. It can be done for short term applications but is really stressful to the fish
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