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12 votes

Would a small amount of bottled water mixed in with an aquarium harm the fish?

Don't panic, it's probably okay! The key thing here is that you caught the error and asked the question. I'll cover both bases here and try and explain a few things (forgive me if you already know ...
Henders's user avatar
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8 votes
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What is special about an aquarium using no carbon dioxide, no fertilizer and no filter?

It is special in a sense that most aquarium setups include a lot of equipment, mainly a filter; the filter facilitates cultivation of nitrifying bacteria that are responsible for neutralization of ...
lila's user avatar
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8 votes
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Fish swimming with mouth always touching the water surface

Fish swimming with their mouth constantly glued to water surface is a sign that they are gasping for breath. However, the reason for them being short for breath usually isn't the low oxygen ...
lila's user avatar
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7 votes
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Best way to adjust fish tank water chemistry

Firstly, I'll go for my old refrain "consistency is key". It's better to have consistent water parameters than changing them continually to 'chase the perfect conditions'. Firstly, your nitrite ...
Henders's user avatar
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6 votes

Can I add soda water to my tank to supply CO₂ for my plants?

Soda water uses carbonic acid to produce CO2 so in theory it should work, but it is not that easy: carbonic acid is as the name says an acid, and any type of acid will lower the water's pH too fast ...
trond hansen's user avatar
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6 votes
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What are normal pH fluctuations, and what could be causing extreme fluctuations?

The pH should not change more than 0,2 during 24 hours. If it is more, it can stress your fish. The goal is to have a neutral pH of 7,0 for most fish, but this is very dependent on the type of fish ...
trond hansen's user avatar
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5 votes
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Why do my Glofish Skirt tetras stay on surface after 30% water change?

When fish goes to the surface of the water there is some thing wrong, like the lack of oxygen or the presence of poisonous substances in the water. The water test you are using is not reliable and it ...
trond hansen's user avatar
  • 19.6k
5 votes

CO₂ supply with KH 0 - pH effect

It sounds as though you already have a good knowledge of how water chemistry works. In basic terms, KH (carbonate hardness) affects how much the pH can change within the water. The presence of the ...
Henders's user avatar
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5 votes
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Is a carbon or cartridge filter necessary in an aquarium with a simple biofilter?

Firstly, thank you for reading about the nitrogen cycle before getting fish! That's a +1 straight away. Biofilter is a bit of a funny term, really, because all filters technically become biofilters as ...
Henders's user avatar
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5 votes

New betta problems - I was unaware of cycling before new tank

1. Get a water test and update your question with the readings of pH-ammonia-nitrite-nitrate. 2. Stop feeding your fish to get the bioload down. 3. Keep changing water 20% each day (use dechlorinator ...
trond hansen's user avatar
  • 19.6k
5 votes

Can't reduce my nitrite/nitrate levels, any help appreciated!

The first thing you need to do is to add some aquarium salt, this is done to counteract the effect of the nitrite on your fish' gills. The aquarium salt concentration to use is 0,3%. Do water changes ...
trond hansen's user avatar
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4 votes

Aquarium is stuck on a nitrite spike

Basically it is indeed a patience game. But how often do you change the water, and how much? Since your doing a fishless cycle (which is indeed the recommened way to do it), you don't actually have to ...
Diether's user avatar
  • 1,285
4 votes

Aquarium water becomes overly acidic very quickly

If you're experiencing sudden drops in PH after a water change, run an experiment by filling a bucket with tap water. Test the PH immediately after filling and then again the next 24 and 48 hours. If ...
Stacy Fakename's user avatar
4 votes
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Axolotl nitrate levels high- more frequent water changes?

Water changes will indeed reduce nitrate levels within your tank and with 80ppm you'll definitely want to reduce that as soon as you can. You could increase the percentage of your water changes, but ...
Henders's user avatar
  • 5,125
4 votes

Can I add soda water to my tank to supply CO₂ for my plants?

First we need to clarify, what is exactly in the bottled water: To make it sparkle, the companies add CO2 gas. (In some dwells this gas was taken by the water, when dropping through the different ...
Allerleirauh's user avatar
  • 6,006
4 votes

Massive koi death in pond, without an apparent reason -- need help!

What I think might have happened before your koi started to die is this. As the temperature in your pond got above 20 °C, the koi eggs started to mature, and after some days of temperature still ...
trond hansen's user avatar
  • 19.6k
4 votes

Is the filter change necessary?

No, you do not need to change the filter material. But what you need to do is remove the charcoal and replace it with new filter foam (filter sponge). The charcoal is only needed if you are removing ...
trond hansen's user avatar
  • 19.6k
4 votes

Would a small amount of bottled water mixed in with an aquarium harm the fish?

First, as Henders says, this is almost certainly not an issue at all. But I would continue to use tank water to thaw the krill from here on out. In fact, I'd go a step further: you can put the tank ...
Jason DeVito - on hiatus's user avatar
4 votes

What’s wrong with my Betta fish?

It's always hard to identify when a fish is doing poorly. But what I always recommend is making sure they have the right environment. That's always key to having a healthy fish. Once they're in the ...
Gwendolyn's user avatar
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4 votes

New GloFish are staying at top and sides of tank, not swimming around

Sorry to hear about your fish. Please don't despair, a lot of shops set you up to fail. From the sounds of what you've written in your question, you did everything right. Firstly, make sure you read ...
Henders's user avatar
  • 5,125
4 votes
Accepted

Female guppies are fine, but male is sick

High concentration of nitrite ions (1 mg/L of NO2-) is the most concerning thing in the list of your water parameters; it is many times above the toxicity threshold, because nitrites may start to ...
lila's user avatar
  • 195
4 votes

Why do my Betta fish keep dying?

The existing answer gives a good course of action and one of the comments suggesting the source of the fish (i.e. the local fish store) might be a good one to follow up. Some fish stores even offer a ...
Pam's user avatar
  • 606
3 votes

Does dosing a tank for sicknesses cause harm if I can't diagnose the illness?

By changing the gravel you have removed an overly large portion of the bacteria. Stop feeding and angle the water outlet from your pump/filter upwards to get more movement of water in the surface (to ...
trond hansen's user avatar
  • 19.6k
3 votes

Could my gravel be causing my tank to be cloudy?

What are the differences between the tanks? If the cloudy tank has fake plants in it and the others have real plants. You add a little salt to the real plant tanks. Water softerns in houses for well ...
Dosvita's user avatar
  • 61
3 votes

Axolotl nitrate levels high- more frequent water changes?

Test your tap water for nitrates to be sure that isn't contributing to your problem. And yes, more frequent water changes can help with keeping nitrate levels down. The addition of ghost shrimp can ...
wastelander's user avatar
3 votes

Can I switch from using distilled water to tap water in aquarium?

It depends. As others have mentioned, the quality of water in different places is always different. To determine if your water is suitable for aquarium usage, run a battery of tests with the water, ...
rlb.usa's user avatar
  • 2,516
3 votes

Can I switch from using distilled water to tap water in aquarium?

Short answer: No Longer answer: But you should probably not do this change at once. The fish might need some time to adjust to the 'new' water. And you should never do a 100% water replacement ...
Diether's user avatar
  • 1,285
3 votes

Aquarium is stuck on a nitrite spike

It can take 4-6 weeks for your aquarium to cycle. So you just need to wait. You don't need to do any water changes, this is only required when doing a cycle with fish so the ammonia/nitrite is kept ...
trampster's user avatar
  • 250
3 votes

Reason for fish dying

Do you use faucet water when refilling the tank? If so then you should be using the de-chlorination tabs, or the little bottle of liquid that treats the water. Also a 2' by 1' tank for 4 goldfish can ...
Iqbal Khan's user avatar

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