Two Holes in back of Tank

[htorresphotography]

Just got this set up and we found out the hard way that there were two holes in the back of the inside of the tank that sucked in my anemone almost killing it. Its a JBJ 20 gal Nano RL tank. One hole is located at the bottom left of the filtration box chamber, and the other on the bottom right going into the pump chamber.

Does anyone have information on the purpose of these holes?

 

[Jekyl]

Welcome to R2R! I'm sure others will chime in who have the tank. My only piece of advice is that if it is a brand new tank, to return the nem. Survival for them in a new tank is next to none.

 

[vetteguy53081]

Just got this set up and we found out the hard way that there were two holes in the back of the inside of the tank that sucked in my anemone almost killing it. Its a JBJ 20 gal Nano RL tank. One hole is located at the bottom left of the filtration box chamber, and the other on the bottom right going into the pump chamber.

Does anyone have information on the purpose of these holes?

Looks like a modificatopn as there is one only for return line. I would fill with rubble or get a plug at home depot that fits the hole.

https://www.jbjaquarium.com/wp-content/uploads/2021/10/UserGuide_NRL-10-15-20_web-1.pdf

 

[jabberwock]

I can see them clearly in the owner's manual, but it makes no mention of their function. They are supposed to be there, but why???

 

[htorresphotography]

Looks like a modificatopn as there is one only for return line. I would fill with rubble or get a plug at home depot that fits the hole.

https://www.jbjaquarium.com/wp-content/uploads/2021/10/UserGuide_NRL-10-15-20_web-1.pdf

Thank youVetteguy53081...

 

[jabberwock]

 

[jabberwock]

My guess is it is some kind of fail safe. Maybe don't plug it?

 

[jabberwock]

If you are concerned about it being an escape hatch, plug it with filter foam.

 

[htorresphotography]

My guess is it is some kind of fail safe. Maybe don't plug it?

I read through the .anuel and there is nothing in reference to it. intresting, I wonder if your on to something here.

 

[ScottJ]

I read through the .anuel and there is nothing in reference to it. intresting, I wonder if your on to something here.

I would assume they are there to prevent the rear chambers from running dry if the water in the display gets too low. The Evo 13.5 has the same thing. I plugged mine.