I know what killed all of them in my tank! But I would not suggest it to anyone.
I have an algae turf scrubber that I DIYed, long story short, one of the lights had fallen into my sump shorting it out. Puff of smoke, a trip of the GFCI, and a week later I lost several corals, and every vermetid in my tank died!
No idea if it was some reaction between the copper wire and the salt water, or if the puff of smoke caused something, but every vermetid in my tank died. The following week I had several small cuts on my hands from cleaning them, and spiroid worms from every pipe, and hard surface in my tank.
I have an algae turf scrubber that I DIYed, long story short, one of the lights had fallen into my sump shorting it out. Puff of smoke, a trip of the GFCI, and a week later I lost several corals, and every vermetid in my tank died!
No idea if it was some reaction between the copper wire and the salt water, or if the puff of smoke caused something, but every vermetid in my tank died. The following week I had several small cuts on my hands from cleaning them, and spiroid worms from every pipe, and hard surface in my tank.