Exciting news that the neons may be in their new home this weekend, hope that goes well and they will enjoy the new setup. Hope you are seeing some of the yellow babies you hatched.
I have been doing my Taiwan Bee tank today so been filtering and mixing water. Sometimes I go over the desired TDS a bit but just to keep it tidy I put a little extra pure RO in the new water and that reduces it, little at a time until you get to the figure you are aiming for. If you still have the spreadsheet I downloaded you can tell on that what will happen, ie my tank (28L) this morning TDS 164, replaced 2L with new water of TDS 119, should make it TDS 160 when water mixed/finished later.
I have been reading up on here and lots of people seem to think Taiwan Bee shrimps stop breeding during the winter. I haven't seen any new new babies so hopefully that is correct and that will then help with the over population temporarily anyway.
Pleased to hear it is all going so well for you now.
Simon