This really hurt losing ALL my shrimp
I recently started my 20 gallon high tech tank. I watched lots, and I do mean, lots of youtube videos, did some research. And finally, thought I was ready to get into high tech world. I did DSM to get the Dwarf Hair Grass and Monte Carlo carpeting and all that. So far so good.
I flooded the tank, added pressurized CO2. This is my first time, but all the information from internet helped.
Initially, I was running about 3 BPS and then slowly, dialed it back to 1 BPS. So far, my plants were doing not bad. Specially, for someone doing it first time, with all the heavy demanding plants, red plants, they were doing not too bad.
I started getting algae. I wasnt really worried. I had the CO2 come on around 2, and the light at 3, then they get turned off at 9 and 10 pm, respectively. No worries, just handle it. I got a Nerite snail. A Bristlenose pleco.
Finally, once I realized that so far, everything is going well, maybe its time to add some Shrimp. I added about 30 Crystal Red shrimp. And then wait about a month, and add 20 Red Cherry shrimp. So far, they were doing great. I think I lost somehow, about 2/3 CRS, not sure why. I did test my water and it was fine. 0 Ammonia, 0 Nitrite, and 20-30 Nitrate. Rest of the shrimp were fine.
Eventually, my CO2 ran out. Swapped it with a brand new one on Friday evening.
I set it up so that I can connect the line from my cylinder, to the bubble counter with check valve, which connects to one of those inline diffuser. It was working fine, except now, the gas was not going through my bubble counter. I was not able to see any activity in the water there. So, I took another line, and connect that directly to the cylinder and the other end in the water, and I can see that there were bubbles. So it had to be the bubble counter.
Anyway, I connected back everything and kept trying. I was not get it to working for the love of god. So, finally, I decided to order one of those not so efficient diffuser, and use that while I figure out how to get the existing system to work.
At this point, all the connections have been turned off, or so I thought. I checked and the meter was reading as, tank pressure - about 50 kg/cm2 or little over 500 PSI, and the other dial was at close to 5 kg/cm2 or 80 PSI.
I was testing things out as nothing was working so far. In my last cylinder, it was about 35 PSI for the second dial. I didnt really think of it too much because I figured, needle valve is turned all the way to off at the time, and its not working anyway. Again, so I thought.
Long story short, I come home on Saturday afternoon, and find that my tank dials both are at 0, light as feather, and EVERY single critter in my tank are dead.
The only thing survived was that Nerite snail, which my guess is that it was out of the tank water at the time.
At some point, the CO2 started pumping massive dose, and that gassed them all. This sucks!!!!!!!
So, whats next for me? Well, I am going to get a new cylinder, then remove that snail to my second tank. I got lucky with him once. No need to risk it. I will try to figure out how to get everything stable. I will use cylinders couple more time, and if I see still stable connection and gas exchange, only then, will I consider anything animal in there again.
So for next 3-4 months, it will be plants only tank.
If you have enough patience to read through all this, first, thank you!!!!!!! Second, if you have any advice, wisdom to share, please do so. Things I could have done better, things I should have, feel free to mention. At this point, any advice will be helpful.