RCS die off

Well, it's only been two days since my last post, so not much has changed.

I have Flourite Onyx Sand as the substrate in there, and I don't like it. As far as being Flourite Sand, it's not a problem, although, in retrospect, it's a bit of a waste since I have no root feeders in there. My problem with it is that the name is misleading. Onyx brings to mind black, lustrous, and glassy, much like obsidian does, at least for me. It's gray. Granted, I wouldn't have had a problem with the gray if I wasn't expecting gray, but still, I'm not terribly pleased by its appearance.

Anyway, the only actual "update" I have is that I went after the tank before covering it up last night (I have another thread http://www.aquariacentral.com/forums/showthread.php?272828-The-ants-go-marching and I was spraying stuff last night) and used a flashlight, and saw 8 or 9 tiny juvies on the bit of algae wafer I threw in there. The population is too low to justify a full wafer. I saw about 15 RCS last night. Earlier in the day, I saw about a dozen, but none were the tiny shrimplets, so I know there are plenty of hiding places. I also saw one that was very lethargic, and I won't be surprised to find that it died when I next look.

I do wonder if I got some bum stock. I bought some RCS from a guy on here (and haven't seen him since), and then I wiped out my biological filter a week or so later. I was somewhat disappointed because I wanted to diversify the gene pool a bit, and the RCS I received were much more pale than the pictures I was sent. However, there was quite the problem with getting the shipment of RCS to me, because every single one was DOA on the first shipment, and probably a third in the second, but the second had enough freebies as extras that I still ended up with almost as many as I paid for. I assumed it was due to the differences in weather between our locations. Now, since I've seen no activity from the guy for a while, I wonder if he had some bacterial illness in his RCS, whether he knew it or not, and I am now the proud owner of that. It may have been easier to diagnose if I hadn't killed off my biological filter at the same time, but it is what it is. I'm just feeding and looking, trying to see something positive happening aside from bladder snail reproduction. Those things are just loving the tank set up, because for snails that don't reproduce quickly, they're reproducing quickly, so I know something in there isn't happy, specifically for the shrimp. It could just be that the hardiest of the ones that survived the weeks of crashed cycle (between not realizing it had crashed in the first place, and then getting it cycled again) are still dying off, and the once they're all gone, the deaths will stop. I have a few that were added after the cycle was reestablished, and the new juvies that have hatched, and the slightly older juvies that may have been impacted by the cycle while still in the egg, so we'll see, I guess.
 
Sorry I can't be of much help but I want to let you know again that I am rooting for your little guys and I understand your pain. Good Luck!

Thanks, Jen. It's frustrating, and I find it sad. My wife's upset, but she sees dollar signs instead of shrimp. The only thing she actually cares about in any of the tanks are the driftwood (with lovely peacock moss and/or java fern attached), betta, angelfish, and cardinal tetras. I'm fervently hoping that it's just the hardiest of the survivors from the crash that are finally succumbing to their injuries, and that these new RCS grow and live. If that happens, then I can be relatively certain that it was just the crash that's caused the problems. If not, I have to worry about bacterial infections, and I'll be bleach dipping or boiling everything in that tank. I may just pour bleach directly into it after everything has died, do a number of water changes, and throw down a ton of prime, and then cycle the tank again.
 
Ok, things are starting to seem plausible. Bladders snails reproduce quickly when there is an abundance of food, very quickly. When excess food is not present they truly do stay to a minimum, I've experienced both first hand. Re-cycling the tank, RCS die off and an increase in bladders snails seem connected. RCS require VERY little food. Perhaps you are low on bio-film from the crash but with so few shrimp I think you'd be fine feeding even less than you currently are, maybe even nothing at all for awhile if the tank has been setup for awhile and/or you have some algae.

If you add a weak strain (which I agree you may have gotten) to all that..... Do you have any RCS from a different source?
 
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Oh yes. They're in the 55, and I inadvertently added between 3 and 5 when I moved a piece of driftwood over. Mgamer20o0 sold them to me, via his bobstropical.... .something website. They. Are. Awesome. I just wanted some from a different source for genetic diversity. So, since they're (the 3-5) the largest, by far, in the 10, they're easy to identify I'm trying to keep an eye on them and their activity.

I fear that the biofilm quantity is low, so I've been supplementing. 2-3 NLS pellets (the .5mm that I feed in my 55) once or twice a day, and then a piece of an algae wafer or a piece of Mosura shrimp food stick once or twice a week. The snails eagerly nibble on the wafer if the shrimp don't pull it away, but ignore the shrimp sticks for the most part. I imagine the snails are getting to the pellets if the shrimp ignore them long enough.
 
Great, keep an eye on those awesome guys. Do the good big guys go right for the food in this tank? Vigorous eating is a sign of good health so if the newly added but older better looking shrimp are seen eating well that is a fair sign the the problem is/was poor stock combined with the crash and hopefully the "tank" will be fine after the weaklings die off.

Edit: Whoa, sorry for the run-on sentence! lol
 
If they know it's there, yes, they all tend to go for it, especially the bigs, they just don't always notice it quickly.

:cool:
 
I wouldn't go that far. I've found a large molt, last night actually, but I've also seen one of the larger ones dead this morning, and a smaller one. I think I'm down to 2 or 3 larger RCS in there, but I only saw one this morning. There are, however, lots of hiding places, so I'm not assuming the others are dead yet. I counted 11, including smaller ones, last night, 9 this morning, but yeah, hiding places, so I'm not sure how many are in there. I'm going to just let it go, and if the population starts growing again, I'll consider it healed. If they all die off, I'll debate whether I'm going to throw away substrate, or just boil/bleach it and filter media, and I'll bleach dip the java fern/driftwood and other ornaments in there and the filter itself (after disconnecting the motor, of course). All of the bacopa, peacock moss, and bits of subwassertang that have managed to not die yet will be thrown away, possibly the marimo ball (maybe this'll get bleach dipped as well, I'm not sure), as I have lots more of it in my 55.
 
Water parameters are solid, and have been for weeks now, yet there are still a higher rate of death than I've previously experienced. There have been, since Saturday, 2 deaths I've seen in this tank which probably has fewer than 12 RCS in it. I didn't have that many deaths in my 55, which is probably back up to 120 or so RCS. By now, it's unlikely that the RCS in the 10 were there when the crash happened. So, if there are still numerous deaths, but it's just impacting the RCS (plants seem fine, snails seem fine), then it may be some kind of bacterial or viral problem. I did buy some RCS from a vendor before the tank crashed, but if these new shrimp carried a pathogen, the pathogen could have been killing the RCS along with the poor water quality from the crash. I'm not saying that I'm certain I got sick RCS from this guy, nor am I saying he knew when he sent me the RCS; I'm just saying it's possible, and it's even possible he's discovered the problem himself and is trying to solve it as well, because I haven't seen any activity from him. Now, I'm still getting a high weekly percentage of deaths, so that only leaves the potential pathogen as the cause. Bleach dip and cleaning will be a way for me to basically wipe the slate clean and start over once all the RCS are dead. Until they're all dead, I have hope that they'll recover without my intervention. Once I'm sure the last one has died, I'll nuke the tank.
 
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