1. Setup 3L tank using the Walstad method on August 30, 2023. I used potting mix topped with sand. I used regular tap water. No filter or heater.

2. Did a 50% water change for the first time on Sept 22, 2023. I used tap water that I aged for 24hrs.

3. Added 3 adult and 1 teeny tiny baby orange neocaridina on Sept 24, 2023. Acclimated using drip method.

4. Yesterday, I saw 2 molts so I can tell two adults molted. I am not sure if the 3rd adult molted yet. The tiny baby is visible to the eyes now so has grown and must have molted.

Please help when should I do the next water change? Do I even need to do a water change or just top off? If I should do a water change, what percentage should I replace? And going forward what should be the percentage and frequency of water changes?

I will be using aged water again but this time adding an API water conditioner. I will brush the insides to clean up the algae a little. Its sitting on the kitchen island and gets light from the large kitchen window mostly.