Is my tank overcrowded?

[Stanzzzz7]

My opinion is you are overstocked.
Without going into water parameters, the size the fish can grow to is enough to reach this conclusion.
The stingray could reach the width of your tank.
I keep a reticulated stingray in a temporary 7x2x2.
My ray has a 12 inch disc and I am already concerned it has enough room.As a result an upgrade is in planning.
Reticulated rays are one of the smaller rays.I believe to be happy a Motoro will need a wider tank.
When all the other fish grow along with your ray,things would get very claustrophobic in my opinion.

 

[kewpiefishypewpie]

I wouldn't keep bichir with rays either, it can end very badly for one or both parties

 

[Drstrangelove]

How did you calculate that?

1) Current length and type of the fish = weight

2) Current age of the fish = amount of food needed per day per weight of fish for maintenance and growth

3) Cumulative effect of #1 and #2 equals amount of food added to the tank each day

4) Amount of food added to tank x % protein = amount of grams of protein added to the tank

5) Amount of protein added to the tank = nitrates added

6) Nitrates added / size of tank = ppm added

7) ppm added per week adjusted by water change amount = long term nitrate ppm in tank

 

[J. H.]

1) Current length and type of the fish = weight

2) Current age of the fish = amount of food needed per day per weight of fish for maintenance and growth

3) Cumulative effect of #1 and #2 equals amount of food added to the tank each day

4) Amount of food added to tank x % protein = amount of grams of protein added to the tank

5) Amount of protein added to the tank = nitrates added

6) Nitrates added / size of tank = ppm added

7) ppm added per week adjusted by water change amount = long term nitrate ppm in tank

Where do you get all this info? I can never seem to find growth rate or length/weight ratios or metabolism info, and not due to lack of trying. I know goldfish are one of the most studied fish, and even goldfish people weigh their fish and food to figure out bioload and will tell you "current age of fish" is impossible to know unless either you bred it or know the guy who did.

 

[Drstrangelove]

Where do you get all this info? I can never seem to find growth rate or length/weight ratios or metabolism info, and not due to lack of trying. I know goldfish are one of the most studied fish, and even goldfish people weigh their fish and food to figure out bioload and will tell you "current age of fish" is impossible to know unless either you bred it or know the guy who did.

Lots of places, here and there, online. Basically I've been collecting bits and pieces for years.

Weights are scattered around often in mundane science and ecology studies:

1) records for fish by species
2) science studies of lakes and rivers where people are collecting and weighing specimens
3) studies of growth rates in conditions of ammonia, nitrates, different foods, etc.

Growth Rates/ weight metabolism

1) see above
2) studies on feed growth rates (i.e., food conversion ratios) using different foods or additives
3) farming studies in third world countries trying to make fish farming work better, here there is a goal of rapid growth and study, so food, weight, growth is checked constantly
4) age is known since they start with fingerlings or smaller
5) metabolism is tracked by age in some studies, correlating food intake, growth, etc.

Basically, there are lots of science studies out there on multiple species, including tropicals.

Some is chemistry (protein to nitrates), some is math (nitrate levels given nitrate input and water change volume and rate), etc.

 

[J. H.]

Lots of places, here and there, online. Basically I've been collecting bits and pieces for years.

Weights are scattered around:

1) records for fish by species
2) science studies of lakes and rivers where people are collecting and weighing specimes
3) studies of growth rates in conditions of ammonia, nitrates, different foods, etc.

Growth Rates/ weight metabolism

1) see above
2) studies on feed growth rates using different foods
3) farming studies in third world countries trying to make fish farming work better (

Some is chemistry (protein to nitrates), some is math (nitrates levels given nitrate input and water change volume and rate), etc.

Thank You.
I know it is a lot to ask, but you have a lot of knowledge/info and it would be great if you made a thread to help others use it. even if the thread was nothing more than a series of links, it would help a lot of people.
When you say "Basically I've been collecting bits and pieces for years.", i cringe, I want to know this stuff NOW!

 

[Drstrangelove]

Thanks. I'll think about how it could be done so that it might actually have a chance of being useful.

 

[Alvintyw]

I really want to keep the RTG. What are the fishes can I still keep without being overstocked.


I am able to give some of the other fishes to my friend who has a 150gallon tank

 

[Alvintyw]

1) Current length and type of the fish = weight

2) Current age of the fish = amount of food needed per day per weight of fish for maintenance and growth

3) Cumulative effect of #1 and #2 equals amount of food added to the tank each day

4) Amount of food added to tank x % protein = amount of grams of protein added to the tank

5) Amount of protein added to the tank = nitrates added

6) Nitrates added / size of tank = ppm added

7) ppm added per week adjusted by water change amount = long term nitrate ppm in tank

Thank you for the info

 

[Warborg]

I really want to keep the RTG. What are the fishes can I still keep without being overstocked.


I am able to give some of the other fishes to my friend who has a 150gallon tank

The RTG alone can get up to 3-4 feet and needs 600+ gallon to move around normally.

Koi have been seen pushing 36 inches before.