what will happen if.....? - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 6 Old 01-15-2008, 11:57 PM Thread Starter
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what will happen if.....?

Hi Aquaripure, I have a few questions please help.

1. What's the aftermath if I accidentaly allowed the DO NOT to happen? Will it be bad enough to kill the fish? How do I remedy the situation once I discovered one of the DO NOT has occured?

A. Do not completely open the outflow valve for more than a few seconds.
B. Do not drain the contents of the denitrator back into the tank at any time except at the recommended flow rate.
C. Do not exceed the recommended flow rate.

2. And how do I know if my tank has the DO NOT conditions, with what symptoms to observe or tests to perform, that I can do to verify and fix it?

3. Any by-product in the effluent? If so, What water parameters will be affected such as PH and hardnesss?

4. How do I know if the product is working properly? The shipper can drop the filter but I can't inspect inside to know if things are running accordingly.

5. Can the filter be damaged internally but the operating process seems ok, and any possibility that it will kill the fish?

6. Any circumstances the filter can wipe out an entire fish stock by malfunction or mis-operated?

7. If the fish seem sluggish, loss of appetite, and some breathing more heavily after the install of filter, what's wrong and how to fix it?

Thanks very much.
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post #2 of 6 Old 01-17-2008, 09:42 AM
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Answers to questions

1) It is POSSIBLE that if enough of the effluent from the denitrator went back into the tank that a loss of life could occur. This really can not happen by accident if the instructions are followed though. If somehow it did happen for whatever reason the best thing to do would be a large 50% or so water change and of course to set the flow rate on the denitrator at the proper rate.

2) The fish might suffer the same symptoms as low oxygen in the tank. There are oxygen tests that can be purchased. This is the biggest danger and this is what will cause any loss of life. Also, the tank might become cloudy (but not necessarily) due to a bacterial bloom in the tank.

3) ALL byproducts in the effluent are gasses that are less soluble in water than CO2 and O2 and so will quickly be replaced by CO2 and O2 in normal circulation. The pH will decrease in all tanks naturally over time. The Aquaripure does speed this up slightly but the effluent does not need to be buffered with calcium carbonate like in a sulfur denitrator. In my 180 gallon reef tank a tablespoon of sodium bicarbonate a week was enough to keep my pH in balance.

4) The internal components really can't be damaged. The exterior could be damaged in shipping but a careful inspection should reveal this.

5) No.

6) If the directions are followed the filter is perfectly safe. Unfortunately there have been rare circumstances where directions were not followed and there has been loss of fish. It was the result of the flow rate not being set as directed.

7) Those are symptoms of low oxygen. Sometimes when the filter is first installed the aquarium takes a couple of days to adjust but it should not be this severe. A water change would help if the fish show signs of low oxygen.
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post #3 of 6 Old 01-18-2008, 12:10 AM Thread Starter
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Greatly appreciated for the response. Just one more quick question. Instead of doing 50% WC, can you just stop the denitrator and add extra oxygen into the tank such as using air pump and powerhead to bring the water condition back to normal? Same thing or different?
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post #4 of 6 Old 01-18-2008, 07:25 AM
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Answer to question

No, that would be a bad idea. That might help the bacteria bloom even more without eliminating any bacteria. It might hurt more than help ... I believe a water change is definitely best if fish ever show extreme signs of oxygen deprivation. I would slow the denitrator to the correct rate or even a bit slower until fish are back to normal.

I would also like to point out that dosing a saltwater tank directly with vodka or sucrose is growing in popularity. I consider this to be a dangerous way to control nitrates with a strong potential to cause a loss of life. The amount of nutrient injected into the denitrator is less or about the same as people dose their tanks with but as long as the flow rate is set correctly the nutrient will largely be confined to the denitrator. This makes the denitrator a much safer method of controlling nitrates.
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post #5 of 6 Old 01-19-2008, 08:12 PM Thread Starter
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Why would there be a bacteria bloom, unless bacteria is coming out of the effluent? Same with after adding vodka and it clouds the water?

Can you also elimiate the bacteria with an UV sterilizer?
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post #6 of 6 Old 01-22-2008, 09:47 AM
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bacterial blooms

Bacterial blooms are caused by nutrient in the tank. All aquariums have these bacteria in them in fairly large quantities. When any sort of nutrient is added to the aquarium it can spur their growth exponentially and often it gets out of control.

The bacteria use up nitrates and a skimmer can pull them out of the water to some extent. This is why some people dose their tanks with nutrient ... but this is dangerous because the bacteria also consume the oxygen in the tank.

In the Aquaripure the flow rate is very slow and so the nutrient is confined within the filter itself. If the flow rate is not set correctly then it is possible that too much nutrient can get into the tank and cause a bacterial bloom. Even this is mild compared to dosing the tank directly. This is highly improbable if the directions are followed.
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