One of my tanks had BGA in it, I presume that if I was to use the magnetic glass cleaner in the other tank it would likely transfer the BGA to the second? Would soaking the magnet in boiling water first kill any BGA and make it safe to use in my other tank?
Apologies, I must have misread your post earlier; you were referring to BGA and not BBA.
BBA is difficult to eliminate.
BGA, as it is a bacteria, can usually be killed through boiling. Though, a bleach dip is more effective.
Of course, the best course of action would be to eliminate the BGA in your first aquarium, then not having to worry about buying a second set of equipment.
Ah nice. My first tank just went into a Blackout today to try and eliminate it I didn't want to use equipment in the mean time that had been in the first tank that I would use in the second (Cleaning magnets, syphon tubes, water change buckets etc.)
I don't mind doing the blackout on the first tank, it is a Fluval Edge 23L with the original lights so getting good plant growth isn't really possible anyway. The second new tank is my first attempt at growing good plants so wouldn't want to have to set them back with a blackout.