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A few days ago I stocked my new but fully cycled 9 gallon planted tank. I purchased Bloody Mary variety from a "local" seller (about an hour away). They use local tap water, which is very hard but I opted to go with RODI since I have copper pipes. I remineralize with salty shrimp GH/KH to the recommended level of 6 dGH and 3 dKH and currently around 212 TDS. After looking at various sources online, this was within spec of keeping neocaridina shrimp. I slowly drip acclimated them to my tank and they seem to be doing ok, one has molted already. I did have a concern about one of my shrimp so I contacted the breeder. I let them know my water parameters and now they tell me from their experience, they won't breed successfully unless it's at least 10 dGH. I am not sure what to do at this point. Do I slowly try to raise the GH by buying Bee Shrimp mineral (GH) only and mix it with the Salty Shrimp with RODI and drip acclimate it in during the water change? I am assuming this is going to take weeks to months. Or do I just wait and see what happens? I purchased 10 (+2) shrimp from them and wanted to grow my own colony. Preferably sooner than later.

What might be successful for one breeder, might not be successful for another. There are more than one way of being successful in breeding shrimp. Since the big difference is the water type being used, I too would stick to the 6GH, 3KH and 212 TDS for the Neo shrimp you have. These parameters have been proven successful for many, many people. Even the RO remineralisers are built to produce these parameters says something. If you find the shrimp are not breeding for you after 3 months, just start swapping their water changes with dechlorinated tap water ... easy. To be honest, I'm surprised the shrimp breed for that breeder at all in such hard water. It would be interesting to see the chemical composition of Indiana's ground water. It must not be Calcium that is making the ground water hard.

Wow that is extreme, I would stick to your original plan. Even if you did match their GH the 2 waters would be different as you are using RO water and they are using tap water. I definitely don't recommend messing about with those high parameters or even your existing parameters, keep it stable and consistant, and give it some time! I have bloody mary shrimp and mine are around GH4/KH1/TDS 158 (when last testeed 2 years ago) and breed like crazy, albeit they are old stock now so mostly wild type unfortunately. It probably wasn't too good an idea to buy from someone thats parameters are so out of whack but you have them now so fingures crossed they do well. By using RO water with salty shrimp the water should be ideal for 'normal' shrimp. They breed from about 3 months so as you don't know how old they are there shouldn't be a great wait!

This is what the breeder told me and this is their FAQ and under the Water Parameters drop down, they list 10 dGH minimum for breeding. https://aquabytes.com/pages/faq

EC to TDS conversion factor of NaCl is usually the one to use.

I managed to figure it out. In the instruction man it says to use NaCI or KCI for an aquarium or reef. My two older TDS meters are very similar around 130 to 140 theres about 10 PPM between them. The new one i received today was 50 PPM. I've bought one for around £45 that can be calibrated so i hope i get a more accurate reading. Thank you for your reply. Have a good Christmas . ?