This is Heidi hiding from Beta Boy. She's in an inverted Pom bottle, stuck thru a hole in the aquarium lid.
I have never seen this done before, with an inverted bottle, and so far only bettas have gone inside. Once they do, they seem to love it. My bettas hang out in the bottles a lot, except for feedings.

This was a breeding experiment where I had two habitats in one tank with seperate bottles.

Betta Boy:



Heidi:


This inverted bottle rig is not popular with my other fish. Mollies, guppies, tetras, cichlids and cories have all shown zero interest. I guess bettas are special in this regard. If you just lay a bottle in the tank, any fish would swim in it, but Bettas will swim up to look around. They don't hide.
I was hoping for big things when the bettas finally got together.

It looked promising, after a couple weeks of close conditioning, but it was not to be.
In the end they tried to eat each other, and you can see the ragged fins in some shots.



I have never seen this done before, with an inverted bottle, and so far only bettas have gone inside. Once they do, they seem to love it. My bettas hang out in the bottles a lot, except for feedings.

This was a breeding experiment where I had two habitats in one tank with seperate bottles.

Betta Boy:



Heidi:


This inverted bottle rig is not popular with my other fish. Mollies, guppies, tetras, cichlids and cories have all shown zero interest. I guess bettas are special in this regard. If you just lay a bottle in the tank, any fish would swim in it, but Bettas will swim up to look around. They don't hide.
I was hoping for big things when the bettas finally got together.

It looked promising, after a couple weeks of close conditioning, but it was not to be.
In the end they tried to eat each other, and you can see the ragged fins in some shots.







































