Shoved an airstone behind the sponge filter and the cories are having a blast, though the other fish are giving them odd looks
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They sure do strange things compare to other fish, when I do a water change my cory like to swim up into the clean water as I pour it into the tank.
Ooohh, my guppies do that too! Some also seem to like swimming into the current if I aim the filter output spraybar so it flows towards the middle of the tank, rather than the back wall, and especially when I've just cleaned the filter and the flow is at it's strongest.They sure do strange things compare to other fish, when I do a water change my cory like to swim up into the clean water as I pour it into the tank.
I learned the hard way by blowing up a brand new airpump I didn't know about water check valves yet.Those little one way valves are quite important. If they don't have an arrow on them blow through them to make sure you put them on the right way around. They stop the water from draining out of the tank if you lose power or the pump stops working.