Is my tank overcrowded?

[Alvintyw]

Hi , I have a 5.2.2 ft tank, 130 gallons.

I have a 18" RTG.
2x 12" maru snakehead
2x 8" monoculus peacock bass
2x 7" endlicheri bichir
A 10" Motoro ray
And 3x 5" koi that I used to cycle tank.

Is it overcrowded?
I can't put links as it is my first post.

 

[skjl47]

Hello; Welcome to the forum. Your first post and you have started with one of the more debated questions on the forum. My prediction is a few will call your tank overstocked. I also figure there are many with even more dense stocking.

Here is my current standard. A tank is overstocked if the fish cannot survive a power outage of two or three days with no added procedures. Just let it sit as in being away for a weekend.

 

[Alvintyw]

I have my tank for about a month now

 

[robham777]

Hello; Welcome to the forum. Your first post and you have started with one of the more debated questions on the forum. My prediction is a few will call your tank overstocked. I also figure there are many with even more dense stocking.

Here is my current standard. A tank is overstocked if the fish cannot survive a power outage of two or three days with no added procedures. Just let it sit as in being away for a weekend.

100% agree with this. Those dimensions are for a 150 gallon tank. In my opinion the 18" RTG maxes out the tank by itself, but I am very conservative. Are you testing your water for nitrate accumulation, and how often do you perform water changes?

 

[Alvintyw]

Yes I do test and I do them once a week. Using OHF filter system

 

[Drstrangelove]

Yes it's far over stocked.

By my calculations you are adding 133 ppm of nitrate per week. So if you are doing a 100% water change with 0 ppm nitrate water, then the fish are being kept in 76-133 ppm nitrate at least 3 days per week.

If you are doing a 75% WC, then they on average they are living in 125 ppm nitrate all the time.

Over stocked.

 

[Alvintyw]

How did you calculate that?

 

[skjl47]

I have my tank for about a month now

Hello; Eventually someone is going to ask about the tank being cycled or not, so I will go ahead and be the first. If it is cycled that will be good to know as it can be left out of the discussion.

In my opinion the 18" RTG maxes out the tank by itself,

Hello; I sort of suspected the RTG either is or will be more than enough but I have not tried to keep them so can not say from experience.

 

[Alvintyw]

Yes the tank has been cycled

 

[skjl47]

Yes the tank has been cycled

Hello; Good deal.