None of the batches that have had issues came from Pet Smart. In fact, the ONLY fish I've ever bought at Pet Smart were the brochis "corys" I mentioned in this thread. The batches with issues have come from what I consider reputable fish stores. One batch came from "The Fish Store", which is ...

I'm still learning, but that nitrate level looks high to me. 20 is high, but 50 is really high. Especially if you don't have any plants to suck 'em up. Seems like you'd want nitrite at 0 as well.

David

I had thought about adding tap water to the 10 gal with say a 50% water change to see what happened, but haven't decided if I want to try it yet. I guess I could do another big water change with bottled water if I start to see issues. I agree that it's not likely something in the water is causing ...

I seem to recall that the sign at Pet Smart did have a different species listed than corydoras for the emerald green "corys" that I purchased. I forgot to write it down when I bought them and was going to go back when I got a chance to get it. I do remember the sign saying that they reached 4 ...

It's been about a week so I thought I'd post an update. The two remaining corys are alive and seem to be doing better, though not completely healthy. They were looking lonely and weren't very active so I got them some buddies to try and perk them up. I now have 8 emerald green corys (from Pet Smart ...

Aqua Dave, I live in Atlanta and I can tell you that if your water is as bad as mine, I wouldn't be too surprised. I solved my problems with a DI unit, and I mix this DI water with tap water. My older cories are more than 5 years old now, and they keep spawning. Good luck! What ratio of DI/tap ...

My CO2 is hooked up to a Ph controller so it only comes on when the Ph rises above 6.9. I run a sump on my 150, which I think would keep the water fairly well oxygenated. This is the third batch of corys I've tried with the same results. So I don't think the stock at the store was bad. I looked at ...

What species of Cory are they? The only thing that really comes to mind is that the difference between the water in the store and your water is vastly different. Did you check the parameters of the water they were in compared to your own before you released the Corys. To be sure that the fish are ...

Temp is 78F. I went back and added that to the original post probably after you read it. I have stuff to "reconstitute" the DI water, but buying something from the store is probably easier. I was thinking the spring water at the stores wouldn't be ok for fish, but it sounds like that's not the case ...

I'm in the metro Atlanta area. Gwinnett county. I thought of seeing if I could find the local water report, but haven't yet. The fish store I purchased the corys from is in the same county so theoretically would have the same water source. I would have put the location in my profile, but it let me ...

I seem to be unable to keep corys alive in my 150 gal tank and am having a hard time figuring out why. I have tried three different batches with almost a year in between each attempt and have had the same results. The most recent batch was labeled as "Green and Gold" at the store, but they didn't ...