Water Quality and Barbs

plmnwater

AC Members
Oct 19, 2004
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Hi there,

I have kept fish for a number of years, but I just got back into it this year. I have a ten gallon that's working fine with some pristellas and tetras. I recently purchased a 46 gallon tank, and set it up with a canister filter, ran it for a few weeks, and added some Cycle. I then added some tiger barbs. They looked fine for a couple days, and then suddenly they started scraping against the tank decorations. I started to treat them for Ich, using the Aquari-sol that was recommended by my LFS. I followed the instructions, did a daily water change/gravel clean. The fish continued to deteriorate, and one by one they stopped eating. The tank is once again empty. :( What concerns me is that they came down with Ich in the first place. The water was treated and running. I searched my city's water charachteristics, and came up with this:

Alkalinity 263 ppm
Hardness 272
pH 7.6
Total Solids 285
Sulfate 20.6
Sodium 6.7
Potassium 7.2
Nitrates 4.21
Calcium 152.6

First, the water that has been entering the tank has been run through my house's water softener, so the hardness is definitely a lot lower than that. But I have read conflicting opinions on whether or not this is harmful to fish.

Second, does anything above look concerning enough to be a problem? I treat all the water with Tetra AquaSafe. I haven't been able to find a definitive resource on what specific chemicals in municipal water can cause problems, and which ones chemical water treatments will take care of.

Absent of water quality, I can't think of any other reason why they should have succumbed to ich. They didn't seem stressed at all when I brought them home, floated them, and added them. They didn't respond at all to the treatment. I guess I'm just searching for a reason because I don't want to try to start the tank back up until I can find a reason for it. Thanks for any suggestions.
 
Tiger Barbs are very sensitive and susceptible to Ick, right up there with clown loaches as the one of the most sensitive fish to this parasite. Just catching and moving the fish is quite enough stress to trigger an Ich outbreak.

Home water "softeners" remove calcium and magnesium ions (bad for detergents/laundry) in exchange for sodium ions. The TDS of your post-softener water will be higher than the input water, even though on a GH test it will be reduced in Ca++ and MG++.

You do not mention nitrogen metabolites - was the tank cycled? What were the ammoia, nitrite, and nitrate readings? An uncycled tank with a new fish load can kill fish even without parasites.
 
I would suggest reading up on fishless cycling to prepare the tank for your next set of fish. The Cycle product doesn't work as they claim and is not sufficient to properly cycle a tank.
 
Thanks, I looked up the article on fishless cycling, this was a new one to me. I will follow the directions on my next round. I am still concerned about the water softener question though, should I be running the bypass when adding water, or is the softened water ok? And will the carbon in the filter remove the traces of the above mentioned contaminents in the water?
 
If you LFS has TDS measurement capability, take in samples of you pre-softener water and the post softener water to get readings, then we could offer better advice.

What contaminants? The nitrogen series? They are not really contaminants, they are mormal tank processing of waste. They are not absobed by activated carbon to any significant degree. Ammonia and nitite need to be oxidized by bacteria in the filter, nitrate is removed by water changes and/or plants.
 
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