So I checked on the filter every 15 minutes, then every half hour, then every 45 minutes, now I'm starting every hour.
So far, dry as a bone!!
What a relief.
Some good news tonight, my marina aquavac that I used to fill the big tank fits the sink downstairs in the laundry room, but not the sinks upstairs in the kitchen and bathroom, which is the floor my other 4 tanks are on.
We're going to the fish store tomorrow, so I ran the hose up the stairs, to see how long an extension I would need to fill all the tanks from the basement, and the 50 footer I have can reach all 5 of my tanks, without being so tight it puts strain on the faucet adapter! Woo hoo! No extension needed.
I'll take a small victory tonight!