Brown Spots On Tank Walls & Shrimp Loss
Hello everyone,
My wife has a ~3 month old Opae Ula 1 gallon tank that she put together, and she's got these brown spots of what we believe is alge (diatom?) showing up on the walls of the tank. We also appeared to have lost one of the shrimp that is laying down at the bottom of the tank. When we went to remove him though, he did show signs of life, but then would sink to the bottom and not move again. Below are all of the parameters of the tank, any suggestions or additional information provided would be greatly appreciated!
- Bright indirect light throughout the full day (of sunlight)
- Located in a "warm" room that never goes below 70 degrees or above 75'ish degrees
- 16 shrimp in the tank so far
- Supplement feeding tank Spirulina about once a month
- We did perform the salinity test and it's roughly 1.007-1.008* (I believe we are reading the tool correctly, please let us know if this should be considerably different numbers)
- I have provided pictures of both the tank up close and the room they are in and it's relation between the tank and windows.
We have researched and considered getting / introducing Tarebia Granifera or Melanoides Tuberculata snails to assist, but are not entirely sure if this is an appropriate or correct solution for the exact issue we are having.
My wife absolutely loves these shrimp and their tank and I am desperately trying to make sure that we do any and everything possible to keep them alive and continue to maintain their lives for a long extended length of time.
Thanks in advance to any and all responses, we greatly appreciate it!
*EDIT: the salinity value was originally listed incorrectly, it's 1.007-1.008, NOT all the way at 1.070-1.080, updated to correct values.