Stingray & Ammonia Troubles

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Pitty27

Feeder Fish
MFK Member
Jun 24, 2018
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Albany, NY
Hey guys!



I need some expertise. I have a 125g lightly planted tank with six bunches of hornwart (oxygenater) with a lightly sanded bottom, large piece of drift wood, connected to a 40g sump tank. In my sump, my water direction is right to left. Two filter socks, 30 pot scrubbies, a medium mesh bag of lava rock media, two heaters keep the temperature at 78-80 degrees Fahrenheit, and two coarse filter pads in the flow chambers. Flow rate is high enough to keep water turned two-three times an hour. A bubble wand sits on the back panel with man-made holes to accommodate the large aquarium.

I am stocked with four three-inch discus, five-inch red spotted silver dollar, four-inch Raphael catfish, and my extremely important and beloved motoro/black pearl hybrid sting ray, shes about six-seven inches long, five inches in diameter, five months old.

This is my problem: I'm REALLY struggling with ammonia. My parameters usually read Nitrates 0, Nitrites 0, Ammonia .25 - .50. Ph sits around 7.5. My tap water reads .50. I have never had this issue until I got my beloved string ray, Otter.


Maintenance: 50% water changes twice a week. Socks are changed bi-weekly. Filter pads are checked/changed/rinsed bi-weekly. Stress coat as a conditioner, I will be switching over to Vanish. I also add beneficial bacteria once a week.

Otter (and other fish) are fed a chum I conjured up of brine shrimp, red worms, tilapia, shrimp, and occasionally night crawlers, once a day to keep waste down and fed enough that everything is consumed within ten minutes to prevent over feeding. All of my fish, including Otter, seem to be very happy and unaffected by the ammonia levels. Otter will flutter up and down along the glass quite frequently, and eats like no ones watching. She is at a healthy weight, no protrusions or ribs are visible and her disc is his mint condition. The only time she hides under the sand is if someone moves too quickly near the tank, otherwise she is out looking for food.
tank.jpg otter.jpg

Please please please, if anyone could help me, I will sincerely appreciate it. I am very open to and welcome to criticism, I want to attempt and succeed at righting this situation of mine. Very much thanks in advance.
 
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Otter is a cutie. Sounds like you have a great start. Ammonia from rays is crazy high hence why efficient filtration is key to ray keeping. A couple things

-make sure left over food from you mix is not getting sucked into filters or hide in decor etc... left overs are ammonia spikes waiting to happen.

-you have a ray now. Count your fish. -1 can be a spike as well and eventually happens.

-you may need much more turnover through your filter. Gut check maths sounds like you have minimum but enough bio media at this size. 1,500-2,000 GPH would really help optimize your filtrations performance. More bio won’t help without more turnover through the filter.

-make sure food isn’t settling inside your overflow towers. They appear large so a powerhead would solve if it’s an issue.
 
Otter is a cutie. Sounds like you have a great start. Ammonia from rays is crazy high hence why efficient filtration is key to ray keeping. A couple things

-make sure left over food from you mix is not getting sucked into filters or hide in decor etc... left overs are ammonia spikes waiting to happen.

-you have a ray now. Count your fish. -1 can be a spike as well and eventually happens.

-you may need much more turnover through your filter. Gut check maths sounds like you have minimum but enough bio media at this size. 1,500-2,000 GPH would really help optimize your filtrations performance. More bio won’t help without more turnover through the filter.

-make sure food isn’t settling inside your overflow towers. They appear large so a powerhead would solve if it’s an issue.


Thank you! I'm really trying over here. How much more media should I add to be safe? As well as how can I optimize my filtration better? Should I have the water moving like rapids or just more swiftly?
 
How long has the tank been set up?
How long has it shown zero nitrates?
How long have you seen ammonia?

My guess, depending on the above, is that it might be in a mini cycle. My guesstimate is that the stingray represents about 2/3rds of your bioload (again, a guess from your OP), and so when it was added, your BB was significantly under populated for the task.

The original bioload was not large, so it's not surprising to see ultra low nitrates with twice weekly 50% changes, but it could also be that the tank is not fully cycled. Increasing nitrate levels with zero ammonia and nitrites, is better evidence of cycling.
 
Thank you! I'm really trying over here. How much more media should I add to be safe? As well as how can I optimize my filtration better? Should I have the water moving like rapids or just more swiftly?

You bet. No one cares if you aren’t doing it perfect just yet, we just get happy to see people try to improve their setup for their animals. Love the attitude man.

Target x10 turnover per hour. That sounds like a lot but it is what is needed to solve the ammonia issue. If you add more media it won’t help as there is enough surface area already, adding more will be empty space as the first few layers have access to the ammonia first. Only more turn over changes that. What kind of pump do you have? There are some easy to use and affordable options in the 1,200-2,500 range.
 
How long has the tank been set up?
How long has it shown zero nitrates?
How long have you seen ammonia?

My guess, depending on the above, is that it might be in a mini cycle. My guesstimate is that the stingray represents about 2/3rds of your bioload (again, a guess from your OP), and so when it was added, your BB was significantly under populated for the task.

The original bioload was not large, so it's not surprising to see ultra low nitrates with twice weekly 50% changes, but it could also be that the tank is not fully cycled. Increasing nitrate levels with zero ammonia and nitrites, is better evidence of cycling.

My tank has been set up about six months. I had just added Otter a month ago in three days. I have been battling ammonia since I've had her. My nitrates sky rocketed a little bit when I first got Otter then two or so weeks ago, everything started to level back except the ammonia won't go under .25 - .50. I can see where a mini cycle would be possible. I fear that with changing the water so much, it's becoming counter productive. Is that possible? It is safe to say she represents 2/3rds of my bioload. I never needed to do this many water changes prior. What can I do about this?
 
You bet. No one cares if you aren’t doing it perfect just yet, we just get happy to see people try to improve their setup for their animals. Love the attitude man.

Target x10 turnover per hour. That sounds like a lot but it is what is needed to solve the ammonia issue. If you add more media it won’t help as there is enough surface area already, adding more will be empty space as the first few layers have access to the ammonia first. Only more turn over changes that. What kind of pump do you have? There are some easy to use and affordable options in the 1,200-2,500 range.


Iwaki Magnet Pump Model MD-40rxt . I couldn't get the entire model number. It was originally a salt water tank I bought from an enthusiast. Its super old at this point, I'm going to need a replacement eventually. I just removed a bunch of dead plant matter hidden away behind the healthy bunches about ten minutes ago.
 
Iwaki Magnet Pump Model MD-40rxt . I couldn't get the entire model number. It was originally a salt water tank I bought from an enthusiast. Its super old at this point, I'm going to need a replacement eventually. I just removed a bunch of dead plant matter hidden away behind the healthy bunches about ten minutes ago.

That pump is rated at 1,334 GPH with a max head height of 13.5 FT. It needs 1” plumbing in and out. Sounds like the pump is old or struggling. Do you have any pics of the filtration/plumbing? A lot of elbows and vents restrict a pump very quickly.
 
That pump is rated at 1,334 GPH with a max head height of 13.5 FT. It needs 1” plumbing in and out. Sounds like the pump is old or struggling. Do you have any pics of the filtration/plumbing? A lot of elbows and vents restrict a pump very quickly.


I've pictured my sump and the entire undercarriage. I did not install any of the plumbing, at most Ive had to replace the tubing due to leaking. The pump is very old. Its going to need to be replaced soon. IMG_20180624_221545.jpg IMG_20180624_221552.jpg IMG_20180624_221601.jpg IMG_20180624_221641.jpg IMG_20180624_221619.jpg
 
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