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No-no, I was refusing to my other system. Simon and you were both very active on that thread. I was responding to his question about that tank. This tank will cycle for 6-8 weeks before neos are added. Long enough to really get some biofilm built up.

Yeah, perfect parameters for shrimp. Raising KH GH and pH to match neocaridina is much easier than lowering it.

Agree with Simon. I would personally aim for just under 200. Say 180-190 TDS, that way you have some room for TDS to rise before needing to change water. When TDS reaches 230-240, than it's time for a water change. Not sure about the water suppliers in UK, but in Aust, everytime it rains and our dams fill up with water, the water suppliers will add additional chemicals (above normal amounts) to ensure it is safe for drinking. That is why tap water parameters fluctuate. At least it doesn't rain much here. You're still cycling the tank with 60-80 shrimp in it? That's not ideal. And it will mean checking for ammonia levels daily. The water change routine might need to be changed to match ammonia levels due to having livestock in a cycling tank.

Agree with Simon. Depending on how old the 3 shrimps pictured are, they could be females.

Simon! Good to hear from you! My plan is to continue with purified water. I will mineralize to the proper TDS and go from there. Right now, I am cycling with Tap, but I will do a water change with RO when the time comes. The crystal setup is doing fantastic. I need to join premium so that I can update pictures. Probably 60-80ish crystals inside now, with a new batch of crystals recently dropping. I had a fight with some black beard algae for a short time, but that was fairly easily remedied. As of now, everything is going GREAT!

Yes indeed I intend to raise the conductivity thus the GH because even Tangerine seem to prefer higher GH. It seems though that they will stand PH6.5, as for KH I will see (I have the KH+ salt as well as the GH+). But I had in previous tank (dennerle 60l tank) both types of shrimps too and caridinas lived in conditions meant for neocaridinas (technical soil but it lost its capabilities, PH was +7) and breeded so ... I am sure they will adapt, they are most robust. I will let you know ;)

Now I have heard it all !