Arrived home to a large pool of water on my study floor. Glad I'm not working away this week. Ok it was only around 5 liters but that's a lot when its not inside the tank. It was pretty obvious the source was the Flex as I have 2 tanks next to each other. Oh no I have a leak
Turns out I did not have a leak after all. Part of the weekly water change is removing MTS from the water return nozzles. I assume they pass through the filter but I guess there is a chance they just climb in and then grow to the point where they can't get back out. Yesterdays partial blockage (stuck MTS!!!) was just enough to increase the pressure on the nozzle aimed at the side of the tank enough to lift some of the returning water over the edge of the tank.
Lesson learnt
Turns out I did not have a leak after all. Part of the weekly water change is removing MTS from the water return nozzles. I assume they pass through the filter but I guess there is a chance they just climb in and then grow to the point where they can't get back out. Yesterdays partial blockage (stuck MTS!!!) was just enough to increase the pressure on the nozzle aimed at the side of the tank enough to lift some of the returning water over the edge of the tank.
Lesson learnt