The last month or so my Vectra M1 return pump has just randomly stopped. I bought a new power supply, but it didn't solve the problem. I cleaned the pump, and it operated correctly for a couple weeks. Then today we've had to restart it at least 6 or 7 times, then restarting only worked for a minute. I took the pump out and found what looks like deposits on the magnet of the impeller. I'm soaking it in a vinegar/water solution, as the deposits don't come of my easily scrubbing, and I don't want to scrub too hard and damage the magnet. I bought a replacement today, a Sicce Syncra sdc 6.0 from an online vendor, but of course it won't get her for a week probably. How long can my tank go without a return pump? I'll move the heater into the display tank. Maybe put my chaeto into an acclimation box in the DT. Drain the sump and replace it when the new pump gets here. I might need to just soak the m1 overnight and get it running again for just one more week, hopefully. Will the tank be ok overnight? It's a 6 foot tank, about 30?" tall, with 2 mp40s giving surface agitation, and 2 tunzes at the bottom back for bottom circulation . Thinking about adding an airstone and heater to dt for overnight. The house should stay about 68° tonight.