What do you think I might be dealing with here?

[SCM_2123]

Hello; Beneficial bacteria (BB). Pages have been posted about them. As far as I know there is not a "for sure" over the counter product you can purchase to get BB.
They can be had for free but there are catches. The simplest way to get a starter culture is to grab some object which has been in an established tank for some time, like months or at least a few weeks. If your local fish shop is decent they might let you have some gravel, snails, used filter floss or something from one of their tanks. If you have a friend with tanks perhaps the same.

The BB are all around us. Start a bare tank filled with water and add a 1/4 cup of ammonia every day or two. Do this for a few weeks and you will have some BB colonies on surfaces in the tank. They show up. This is one method of doing what is called "cycling" a tank. I guess cycling is a made-up name for what happens in nature. Adding ammonia is called "fishless cycling". Some prefer this way as it does not harm fish.

Another way to "cycle" is with "fish in" the tank. The fish excrete waste which contains the ammonia. In a few weeks the BB show up and grow in the tank. Many do not like this way because ammonia harms fish. A way to reduce the harm is to do more WC to keep the ammonia down but that sorta slows the process down.

The goal is to have enough of one sort of BB growing on the tank surfaces to completely convert the ammonia into nitrite. Then to have another sort of BB to convert the nitrite into nitrate. Nitrate is the least toxic of the three and most of us consider keeping nitrate down to 20ppm or so to be good enough. A problem is the BB are slow growers compared to other bacteria. Makes cycling a tank from scratch a week's long thing.

You , the OP, are embarked on a "fish in" way of cycling. I suspect you did not know such. A puzzle is why the ammonia is at zero after the tank is setup since last April. Hence my suggestion to "standard" test the test kit with distilled water.

Let me open another potential can of worms not related to ammonia or cycling. That being your tap water. If you know about prime (SAFE) and use it or some such water conditioner at WC then I will not need to go into that. I am thinking of chloramines or chlorine added to tap water.

I'm using a plethora of chemicals including Quick Start, Tap Water Conditioner, something for slime coat, and Stress Zyme. So with the fish in cycling should I keep doing water changes like mentioning? The ammonia is not at zero it's nitrates and nitrites. Also, the tank has been running for over a year.

 

[skjl47]

I'm using a plethora of chemicals including Quick Start, Tap Water Conditioner, something for slime coat, and Stress Zyme. So with the fish in cycling should I keep doing water changes like mentioning? The ammonia is not at zero it's nitrates and nitrites. Also, the tank has been running for over a year.

Hello; Afraid i cannot give much feedback on most of those products as i do not use them. They may or may not have positive benefits. Perhaps some other member can chime in. I do have and use a water conditioner sometimes. I use PRIME and also have SAFE on hand. Essentially the same product with one in liquid form the other in powder form. If your tap water has a chemical added called chloramine or chlorine such a water conditioner is recommended with WC.

I guess a person could dismiss "cycling" with near 100% WC daily. Such is not practical for most of us, so we try to encourage a growth of the natural bacteria in the tank. One type of bacterium uses ammonia as a nutrient and releases nitrite as a byproduct. The other bacteria use nitrite as a nutrient and releases nitrate as a byproduct. Nitrate is some less toxic so a tank can run with low levels of nitrate.

Some things can be assumed. We know the fish make ammonia as a waste byproduct so in a year you should have some of the BB in the tank. We also know that even tho the BB are slow growers a year is way more than enough time to establish a bunch of colonies.
You mention changing out the filter media a lot. Some on here will naysay that and even suggest to never change out filter media. To rinse the media in a bucket of tank water during a WC and put it right back in the filter. The belief seems to be the BB only grow in the filter media. I contend the BB will be on many surfaces throughout the tank. Sure, some will be lost with the media, but not all. I throw away detritus loaded filter media a few times a year without problems, so I do not hold much risk in your doing that.
So, either something is killing off your BB or your test kit is giving false readings somehow. As I stated before based on what you wrote I begin to suspect the medications used. I do not exactly know such is the case.

Last point this post. With fish in the tank you are doing "fish-in" cycling. I suggest a search on such cycling and cycling in general. You can do WC at high levels and frequency to protect the fish from ammonia toxicity. That by definition reduces the concentration of ammonia and interferes with BB growth.

 

[phreeflow]

I wonder if the beneficial bacteria is off since I had changed the filters as well. I have changed them more lately than previously.

This may be an issue. When you change the filter media, you are also removing the beneficial bacteria that is colonizing that media. Like mentioned before, a mature tank should have 0 ammonia, 0 nitrate, and some nitrite, which can be best removed through water changes. If your ammonia is high and the other levels low, you likely restarted your cycle.

For now, like everyone mentioned, you need to up your water changes, lessen feedings to once every other day, and add salt and monitor

 

[SCM_2123]

This may be an issue. When you change the filter media, you are also removing the beneficial bacteria that is colonizing that media. Like mentioned before, a mature tank should have 0 ammonia, 0 nitrate, and some nitrite, which can be best removed through water changes. If your ammonia is high and the other levels low, you likely restarted your cycle.

For now, like everyone mentioned, you need to up your water changes, lessen feedings to once every other day, and add salt and monitor

That's what I will do. White spots are a sign of ammonia poisoning though? The reason I ask is I didn't seem to see that online.

 

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I did a 40% change. I made sure the vacuuming was thorough. I also noticed a huge algae wafer got churned up that had obviously not been eaten. Im curious if that could be part of the problem. What else can I feed my cories? Here are two of my Congos. I'm showing this just to illusrate what all is going on.