Questions tagged [water-parameters]

The physical and chemical aspects of an aquarium's water that affect the animals living within it. Please provide specific details of what spieces are inhabiting the aquarium and include their respective tags. Common examples of water parameters include pH, temperature, salinity, nitrogen wastes content, general hardness (GH) and carbonate hardness (KH).

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3 answers
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How does one effectively "cycle" an aquarium?

I have read that prior to putting fish in an aquarium, one must "cycle" the tank so that bacteria that oxidize ammonia will produce nitrite, and nitrite-oxidizing bacteria will make nitrate. ...
Peter Grace's user avatar
9 votes
1 answer
10k views

How do I do a water change in my fish tank?

I have seen many questions asking how often one should do a water change for different circumstances in a freshwater aquarium, and so on, which got me wondering. I never knew, until I was on this site,...
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8 votes
2 answers
562 views

What signs indicate good water quality for tropical fish?

What are the signs of good water quality? I want to add fish to my freshwater aquarium, and I want to make sure they have the least chance of dying.
Don Larynx's user avatar
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5 votes
1 answer
4k views

How long to wait before I remove the old filter?

I have recently purchased a sponge filter just like this one. I added it to my tank when it arrived home about a week ago. My tank has been running for over 4 months now. The tank has been stocked for ...
Rémi's user avatar
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3 votes
3 answers
3k views

Why do my Glofish Skirt tetras stay on surface after 30% water change?

I bought 7 Glofish Skirt tetras 3 weeks ago and today was the first time I've changed 25 - 30% water for them in 10G (38L) aquarium. Replaced water was tap water warmed for few hours and treated with ...
YMC's user avatar
  • 141
3 votes
1 answer
3k views

Is my fish suffering from fin rot or is this just a sign of wear and tear?

I've had this goldfish for around 2 years now, and have no problems with it at all. I changed it over to a bigger tank (22 litre) around 3 to 4 months ago, and until now have had no issues. The tank ...
Josh's user avatar
  • 33
25 votes
4 answers
80k views

Are there health risks to leaving a dead fish in the aquarium?

Sometimes one fish dies, without any apparent disease. In previous aquariums I would always remove them as fast as I could. Now my aquarium is a bit bigger, and I have some laziness to remove those ...
woliveirajr's user avatar
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10 votes
2 answers
27k views

Why did my ammonia level rise after a water change?

I have the API freshwater kit. I tested for 0.25 ppm ammonia and 40ppm nitrate. After the water change, I have 0.50 ppm ammonia and 5ppm nitrate. WHAT THE HECK? In fact right before I put water in ...
Don Larynx's user avatar
  • 1,757
9 votes
1 answer
31k views

Why did my established pond suddenly have a mass death event?

For over 8 years I have had a pond in the corner of my home. It is of a triangular shape, about 10' x12' x15' (3 x 3.6 x 4.5 m) by two feet (60 cm) deep. For ...
Dustin's user avatar
  • 99
3 votes
2 answers
756 views

Cooling aquarium with aluminum heat sink

Summer is approaching again. Last summer, I had a lot of trouble keeping the temperature in my aquarium at 30°C. My fish prefer 21-24°C, but I couldn't get it any lower than 30. So I want to avoid ...
HoneyBadger's user avatar
2 votes
2 answers
98 views

Is the injection of carbon dioxide into a planted aquarium a detriment to fish living in it?

From the start, thank you for your time and consideration. Whilst planning a planted aquarium setup that would include CO2 injection, I stumbled across an article about possible behavioral ...
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2 votes
1 answer
1k views

Will pets stores test my aquarium water?

If I have a fish and I don't have the skills and/or supplies to test the water in my fish tank, can I take a sample from the fish tank to the fish/pet store to get tested? If yes, what if any special ...
James Jenkins's user avatar
2 votes
1 answer
15k views

How many days does it take an ammonia spike to occur?

I recently bought a new aquarium along with four small tiger barbs. I'm currently learning how to cycle the water so I was wondering how long can the fish live in the unchanged water before it needs ...
Murtaza Munshi's user avatar
2 votes
1 answer
2k views

Why did all 45 goldfish (and 2 mosquitos) in my pond suddenly begin an overnight, 4-day die-off?

I have a pond, which contains the water volume of 6000 liters (1600 gallons). I am very frustrated: my 45 or so goldfish and several mosquito fish were so happy. Then, literally overnight, they ...
Freewheelin' Franklyn's user avatar
-1 votes
1 answer
922 views

Fish tank keeps becoming cloudy with a green tint

My friend texted me that her 30 gallon (around 114 liters) fish tank keeps becoming cloudy. She has eight small fish in the tank, which means that her tank is not overcrowded. She told me that after a ...
Anonymous's user avatar
-1 votes
1 answer
140 views

Betta dying help

I forgot to save the old water from when I cleaned my betta’s tank and now he’s floating at the bottom. What can I do? I have already tried putting my guppies’ tank water in to do half half and it’s ...
Mariah's user avatar
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