Over the past few days, I noticed that some of my Rili's and STS have been randomly hanging out at the top of my tank, at the waters edge.
I havent done any drastic changes to my tank, just the occasional 1.5g water change (did one yesterday). It has been well established for nearly a year now. I don't really dose anything at all, just using root tabs, and the occasional one pump of iron midweek. Flora consists of flame moss, taiwan moss, and dhg, substrate is yubao. I don't test my GH and TDS, so I dont have those numbers for you, which I'm going to assume, are critical to assess my current situation.
A little bit about these shrimp. The STS were all born in this tank, the mama died a couple weeks later, and from what I've counted, I have around 10 survivors, all of which are in the juvie stages of their lives now. I counted 9 of them in the pic below.
Well, I just came home from dinner and saw this.
All but one of my STS are hanging out at the top. My cO2 is in check, and is just over 1bps. Food is fed every other day, I rotate between Borneo Grow, Kens Veggie Sticks w/ Calcium, Hikari Crab Cuisine and Borneo Barley. Water temp has been pretty steady around 68-70˚. I use an AC20 for filtration, and have it on the side of the tank, so it gets nice flow across the entire tank, bounces off the far wall, and circles back around.
Please help, I'm getting worried that this isn't a good sign.