Kefir grains (WF1)

Hi.
If anyone has any healthy Kefir grains they can spare, id really appreciate some.
I've made Kefir for a few yrs now, and I'm not sure if this batch is healthy or not.
As you can see, there are what seems like bubbles on 1 batch, and not so many on the other batch.
These "bubbles"(?) Have been bigger, and have a soft texture like appearance to them. The "smoother batch" seems to be thick and creamy.
1 has separated more than the other. Due to unforeseen circumstances, both batches have been in and out of the fridge (this time). So, I'm not sure if this is just part of the natural fermentation process... with the possibility of them being (over) fermented/re fermenting...

I am concerned this is a white mould? Rather than natural healthy bubbles/over/re fermenting.
I daren't drink it, in case its mould... and I don't want to waste/discard it all if it is in fact healthy...
Can anyone help?
If u have experience in Kefir making, I hope the pictures are clear enough to see/advise from.

Either way...
Any spare new healthy kefir grains would be appreciated.
Thank-you.
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