Hi!

I recently finished cycling my 5-gallon tank for about a month or so and acquired a couple of Neocaridina shrimp as a cleanup crew. The initial plan was to add a small fish with them, but the plan changed because I think this tank looks so nice with shrimp only.

I've read a fair bit about them and watched a couple of videos on how to introduce them to a new cycled tank, which I've done (added the bag of water to float in the tank for 30 minutes or so, then dripped water into the bag to acclimate them to the new water).

So far, the shrimp seem to like their new home! I'm working toward replacing most of the plastic plants so they can have some natural plants, as I've seen that it's mostly preferred among the community.

It's been almost a week now and they seem pretty chill.

Anyway, I've read somewhere that having shrimp staying at the top of the tank could point to an issue with oxygen in the water. I was considering adding an air stone or something like that, but wanted a second opinion from you guys. They seem to chill at the top of a plastic plant, but they look like they're grazing, so I'm not sure if it's because of that or the oxygen.

Some walk around the bottom too, and some seem to rest there, but I can mainly see them on this particular plant most of the time.

Sometimes, one will "hang" from the edge of the tank.

Anyway, just trying to get some confirmation about this =) Other than that, I didn't expect to like these little guys so much. They're really nice!

Here's the parameters of the tank

Temp : 26 celcius kept with a heater  
pH : 7.8  
KH : 120  
GH : 250  
NH3 : 0  
NO3: 10  
TDS : I currently dont have a tester for this :/

These tests come from test strips, not sure if they're really accuate, I also have liquit test but not for KH and GH.

Is shimp staying close to top of water a bad sign ?