I figured since they were doing so good for this long, I thought I was through the danger period. I think once I get a healthy population and colony going, a shrimp loss won't feel as hard. The next hurdle will be raising the shrimplets.
I always top off with RODI water. I do have a flat lid, it's not really seen in the photos. It covers maybe about 90% of the top, so I do still experience evaporation, but not anywhere without having any sort of lid.
I forgot to mention that during this 2 week period since my last water change, I did do some light gravel vacuuming to remove fungus on the substrate, which included small volumes of water. I did put some remineralized water back into the tank to be safe along with pure RODI. I did not do any testing of GH or KH at this time. Figured it was just a small amount, it wouldn't be an issue. Though this is probably what bumped my GH and KH up slightly. I think my substrate has stopped leaching. I looked back at my notes and there were not any real fluctuations in GH/KH. It was primarily +1 GH but like you said, it could have been from inaccurate tests.
Though I'm not sure why the PH tends to still hold higher. I made new calibration fluid and recalibrated my PH pen last night. In the morning, it still tested at 8.0 PH. I'll have to check tomorrow through the day, since today I'm doing a water change.
I'll stick with the weekly 10% water changes. Today I did a good clean, removed as much mulm and fungus on the spiderwood and substrate as I could. The longest part is dripping the water back into the tank. It takes a little babysitting since I use 2 separate jugs, but yeah, it's definitely a lot less work than my 29 gallon community tank.
Thanks!
Being new to shrimp keeping can be a little stressful at times, since shrimp are so much more delicate ?