Berried yellow female question and another general question

I'm still new to shrimp and I've had a few questions over the last week and still have more but I have a berried female yellow shrimp that dropped down here eggs in the last few days. She had a ton of them but over the last 2 days she has been fanning them nonstop and this morning she barely has 4-5 left. What does this mean? Were they not fertilized? is there another explaination?

The other question I have is in regards of shrimp dying. The parameters seem great but I keep getting shrimp dying off any time I change something. I have yellow shrimp, blueberry shrimp (neocaridina palmata) and 2-3 amano. 10 Gal tank with java moss, java fern and driftwood and rocks, fluval substrate

PH=7
ammonia=0
Nitrite=0
Nitrate=between 0-5
GH= I keep it around 80ppm
Tank was cycled for about 1 month with 6 tetra neons everything went well
we had a hydra outbreak that we treated with panacur

Yesterday I did my water change of 20% in the tank. Water was heated to tank temp before putting it in and treated with Prime. I did add some seachem equilibrium to up the GH that I loose at the same time. This morning I checked the GH after finding a dead blueberry shrimp and it had risen to 100ppm. I suspected that this might be the reason.

I'm a little depressed with all this as we invested about $500 in the setup and we can't seem to get a break and enjoy the aquarium. We are almost ready to call it quits but we enjoy the aquarium really.

maybe someone can help me out at how you should go about adding products such as equilibrium etc or what may shock the shrimp. Maybe I should not be adding it right away after the water change or something. I do dissolve it in tank water before adding etc but maybe it is too harsh for the shrimp if you add it all at once. We really don't have anyone we know that can guide us through the steps involved in starting out with shrimp.

As for ferts, I only dose seachem potassium because the Excel looked like it had the bad effect on the shrimp that people reported even at the suggested dosing so we topped that.

Any basic good help would be welcome

Most of the shrimp have been there at least a month with the most recent about 2 weeks. The feeding was my other question that I posted in a thread yesterday if you want to look at it. I'm pretty sure the hydra is gone and when we treated with panacur, I took out the charcoal filter for the duration of the treatment and after that I added a brand new pouch of seachem charcoal to get rid of the panacur.

Am I just unlucky or do most people starting with shrimp get this much trouble in the beginning?

What should be my aim for the KH and GH?

For the GH the LFS guy told me it could be as high as 110ppm but I try and keep it around 80ppm. I use seachem equilibrium but was wondering when I do my weekly water change of 20%, should I add the equilibrium in the pal with the heater and let it dissolve and add it that way or is the way I do it right now by mixing with some aquarium water and just adding it that way after the water change even if it is not fully dissolved is ok?

I had another death this morning and I'm starting to wonder if the death happens right after molting!

Do you know of a product that is invert safe to raise the GH and one for the KH? I think my LFS only has seachem equilibrium.

Well I went to the LFS and talked with my guy over there and he told me there was another product called seachem replenish which is a liquid compared to the seachem equilibrium. The seachem equilibrium is for planted tanks and I noticed it has iron and manganese which I imagine would not be invert safe. The seachem replenish on the other hand does not have those which may be better but I'm still a little unsure.

My question now is for the people that have kept shrimp for a while. What do you guys use to balance your GH and KH?