It must have been an aluminium heatsink.
The Indium in Liquid metal will eat through aluminium. Only copper or nickel plated heatsinks can be used with liquid metal. It says so on the packet, at least my pack of Thermal Grizzly Conductonaut does.
I will try to add all the old tank's shrimps at the end of August to the new tank, had a problem with my chiller this morning, try to make it more efficient by adding a better heat sink grease, I added a liquid metal grease, apparently you can't add liquid metal, when heating up, the heat sink turning to dust, along with part of the cooler inlet and outlet.
So far the shrimps are ok.
I have had the new shrimps a week and have ordered some new ones(10) for delivery friday. There are probably at least 6 of the 8 alive (they may even all be alive still) but as the tank is so densely planted it is difficult to tell, but I saw 2 black and 2 red this morning, as yesterday, but I'm sure 1 red and 1 black weren't the same as the ones I saw yesterday so there are probably at least 6, if that makes any sense??? Anyway that will be it for now and I will just let the tank and shrimps do there thing once this batch are in there in a couple of days, and I can get back to the usual routine as was, before this unfortunate event wiped out the last lot.
All parameters are good, including the nitrates now, but there are a lot of brown patches on the plants and moss balls still......... It all looks a bit drab and uninspiring and brown!!! I probably just need to be a bit more patient? I will do some maintenance tomorrow and a small 2L water change, then the new shrimps will go in on friday after acclimatising.
The shrimps were totally uninterested in the spinach or shrimp lolly I put in at the weekend but I am assuming they have so much biofilm at this stage that that is keeping them busy and well fed and they are staying under cover until they get used to their new environment and this strange ugly monster that keeps peering in at them through the glass from time to time? I guess if some 100ft tall bloke kept peering through my window a few times a day I would be a bit nervous/reserved shall we say? I removed the spinach and the shrimp lolly and put the shrimp lolly in the betta tank and within minutes there were 10 shrimp on it so there was definitely nothing wrong with that shrimp lolly!