Doing A Monster Tank

Hi! I am new here, but I am not new to he fish hobby. I have currently an Albino Oscar(5inch), Severum(5inch) and an Ornate, Albino, and Senegal Bichir all residing in a 55 gallon tank. But don't worry, I've just been growing them out their, because soon I'm going to he upgrading to a 400 gallon tank(already cycling). I also purchased baby Silver Dollars(6), and 7 Geophagus. Those ones are still small and are in my other grow out tank. All those I plan to put in the big tank. I would most certainly like to add a Malaysian Green Arowana and a Black Ghost Knifefish. My main questions is that how long will it take for he Geophagus and Silver Dollars to reach around 4 or 5 inches? I'd like to time getting the Arowana perfectly to where he won't be eating them because the average size of them at the store is 6 inches. Also I would also like to know if any other fishes can be added and if there are some potential stocking issues regarding their copaibility based on aggression.

 

Hi! I am new here, but I am not new to he fish hobby. I have currently an Albino Oscar(5inch), Severum(5inch) and an Ornate, Albino, and Senegal Bichir all residing in a 55 gallon tank. But don't worry, I've just been growing them out their, because soon I'm going to he upgrading to a 400 gallon tank(already cycling). I also purchased baby Silver Dollars(6), and 7 Geophagus. Those ones are still small and are in my other grow out tank. All those I plan to put in the big tank. I would most certainly like to add a Malaysian Green Arowana and a Black Ghost Knifefish. My main questions is that how long will it take for he Geophagus and Silver Dollars to reach around 4 or 5 inches? I'd like to time getting the Arowana perfectly to where he won't be eating them because the average size of them at the store is 6 inches. Also I would also like to know if any other fishes can be added and if there are some potential stocking issues regarding their copaibility based on aggression.

400 gallons...wow good for you....when it comes to my own experience my silver dollars took a long time to fill out..I have 4 4inch ones in my 150 and the growth rate was maybe an inch every year...I got them at 2 inches....

I think the oscar may pose an issue down the line but besides that I think your stocking is good...just be sure to have your arrow grow up with the tank inhabitable so when it gets to size its comfortable....an arrow raised alone for a good portion of its life may become intolerant of tankmates

 

Thank for the reply, I guess that would mean Silver Dollars are going in last. May I ask if it would be a bad idea to add a pacu or Datnoid? I figured a big tank with tough fish is the opportunity to get those fish I really love.

 

Thank for the reply, I guess that would mean Silver Dollars are going in last. May I ask if it would be a bad idea to add a pacu or Datnoid? I figured a big tank with tough fish is the opportunity to get those fish I really love.

The datnoid would be a really cool addition....I think with the pacu you might be pushing it....

 

What kind of Geophagus?