late night disaster

I woke up this morning to find my 7.5 gallon shrimp tank all over my floor. I am not really sure how the tank leaked onto the floor. I refilled the tank and it does not appear to be any cracks or anything like that.. so I am dumbfounded on this issue. either way, a near empty tank is not a great way to start the day. some of my small shrimp made it in the inch of water that did not drain.
up until this I had been noticing a strange even going on in my shrimp tank as well. I noticed that all my adult females died off, and only 1 adult male and about 20 youngins were left. all the young shrimp look like the male, without the deep full body red. someone said they may still be too young to show sex signs, but its been 2 or 3 weeks from the hatch, shouldnt they be showing some coloring out?

im not seeing any that look to be coloring out like females right now. I run a small sponge filter in the tank. its not an eclipse system, I built this tank myself. I filled it up, it doesnt leak. I resolved that my sponge filter was wicking it down the airline and to the floor off the drip loop. I changed how the airline ran, it now runs vertically out of the water rather then lazily over the edge. there are about 15 Juvenal that survived, the only adult remaining in the tank did not make it through the whole ordeal.