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There are some times when you need to drop the water levels in your tank, for example, to change substrate. You've spent potentially months or even years cultivating a nice layer of biofilm on the walls of your tank. So how do you stop the biofilm from drying out and dying off? The simple solution is gladwrap/cling film/clingwrap. Simply lay a piece over each wall of your tank to keep in the moisture. And when you refill the tank it will float to the surface for easy removal.

Hi Damien, sorry to hijack the title of your previous thread Though, this title is perfect for those pictures: I have set a tank with the water and soil of the creek, and this time it seems to work. Water is KH: 0, TDS : 30. The one at the bottom is pregnant. This did happen in the tank , and I also have shrimplets. Sorry for quality of pictures, they are from a phone. That being said, these critters leave me perplex: I caught them in the wild, but they really look like the Hue bee (aka Princess Bee)...

Crayfish are generally nocturnal, I thought. So your's might be out and about at night. Try turning off your aquarium lights.

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Great suggestion fishmosy. I'll try to do that. Great write up BTW ?

Hello Larry, My opinion is that you have progressed in the Cycle. I believe you will start seeing the Nitrites disappear next and the Nitrates will spike to above 80. You have to be careful with the Ada soil though, as it does continue to leach ammonia for quite a few weeks but it seem you are getting there.