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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
  • 5,125
4 votes
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How to upgrade fish to a much larger aquarium

A couple of weeks later, I have decided to tell you how I did it. It's been over a month since the transfer. The other two answers were good, but they simply didn't work in my case. Since the larger ...
Rémi's user avatar
  • 1,027
3 votes
Accepted

What's the purpose of a gravel blockage of a mat filter?

It's just to prevent gravel from sliding into the corner when the filter is removed for maintenance or to be replaced. Without it, a person would typically need to use both hands when changing the ...
Jestep's user avatar
  • 3,093
3 votes

Sponges for mechanical particle filters for aquariums

Do not use kitchen sponges or other types of household sponges, they have been produced using different chemicals to make them softer and often fire resistant; this is toxic to life in water. You can ...
trond hansen's user avatar
  • 19.6k
3 votes

How do I fix BAD betta fin tearing?

Double check that decor is all smooth. Some of that also looks like it could be fin biting. Healing should be easy, just keep an eye out for rot (blackening around the edges of the wounds). Within a ...
jamn's user avatar
  • 31
3 votes
Accepted

Noisy canister not pumping

The noise from the canister indicates that the pump is still likely working but either the impeller is broken, or, that there is a blockage inside the system. The system has a filter for the input ...
Graham Chiu's user avatar
3 votes

What is the correct order of elements in Haqos EX1500 External Aquarium Filter

The HAQOS EX1500 sucks water from the sectioned tube that is build into the filtration stages and goes all the way down. This filter circulates water through the stages from top to bottom. Once water ...
Guy's user avatar
  • 216
3 votes

Does Juwel Cirax (ceramic biological filters) affect pH in the aquarium

I don't think that it would affect pH in any way (and definitely would not raise it), but I can't find any source to back this up. But about 2-3 months ago I added Cirax to my 180 litre tank (47 ...
Diether's user avatar
  • 1,285
3 votes

Better solution for holding appliances inside the aquarium?

I used silicon sealant in my Oscars tank as he kept moving the heater and tank décor. As long as it's practical to lower the water level whilst you do it, it's a great permanent solution. Just be sure ...
XxjdooksxX's user avatar
3 votes

How to upgrade fish to a much larger aquarium

I think Rolf has a pretty good idea, but I don't see why you have to haul them in the larger tank if it's going to be a problem. You could just get a Rubbermaid tote with a locking lid and transfer ...
Dalton's user avatar
  • 4,494
2 votes

How to upgrade fish to a much larger aquarium

I did something very similar. Pre-move I starter by adding cycled water from my old tank to the new tank. After weekly transferring multiple buckets for three weeks, the new aquarium contained a ...
Rolf ツ's user avatar
  • 161
2 votes

Why is a biological denitrification filter considered cheap to build and operate?

For biological denitrification to take place you need oxygen-free water, as biological denitrification can only take place if there is no oxygen present. In the gravel/sand of your tank there is an ...
trond hansen's user avatar
  • 19.6k
2 votes

How many grams of ceramic rings do I need in my filter?

Biomax = 1 ceramic ring per gallon (3.78 L). As stated numorous times that's just a rough estimate but to be safe, at a very minimum one per. 1 biomax ring = at least 100 ft2 (9.3 m2) so that's a lot ...
Keith's user avatar
  • 21
2 votes
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Juwel Filter Pump Too High?

The pump needs to be fully submerged - not only for cooling, but for lubrication of the bearings in the pump. So if the pump is noisy you need to lower it or add more water to your tank. One more ...
trond hansen's user avatar
  • 19.6k
2 votes

Juwel Filter Pump Too High?

You can get different types of filters some of which are hang on and out of the water, or fully submerged as yours. The issue with the latter is that they take up space inside the water, and add heat ...
Graham Chiu's user avatar
2 votes
Accepted

Aquarium filter... what's the order?

I assume you refer to fresh water. Nobody bothers with pH, KH and phosphate in fresh water. What matters (as far as the filter is concerned) is Physical cleaning (remove debris and particles) and The ...
Guy's user avatar
  • 216
2 votes
Accepted

Can an understock tank be under filtered?

I actually made this experiment because I wanted to know and I was actually moving. From my research, if the filtration is enough for the stocking, it should be ok in the larger tank. Sure, don't try ...
Rémi's user avatar
  • 1,027
2 votes

Why does my nitrate level always read 0?

Nitrates are the the not-so-toxic part of the nitrogen cycle. The decomposition of fish waste goes like this: Ammonia -> Nitrite -> Nitrate, with the two transitions needing a different bacteria. ...
Manuki's user avatar
  • 953
2 votes

My new goldfish is gasping for air

If your fish is gasping for air something is clearly wrong. It can be ammonia (this is a waste product from your fish urine and decomposing food and plant matter). Ammonia will be broken down by ...
trond hansen's user avatar
  • 19.6k
2 votes

Why are undergravel aquarium filters no longer popular at stores?

People consider them obsolete. Under gravel filtration is an old technology, and seems to be going out of favor for newer types of filters, to the point where under gravel filtration has become a ...
Kai's user avatar
  • 16.3k
2 votes

What is this white-ish buildup on my fish filter?

I have never had an external filter like this and I have never experienced such a buildup in the filter - I have always been using internal, fully submerged filters - but based on your photo and ...
lila's user avatar
  • 195
1 vote

Identify filter for fish tank?

You have an ATMAN AT-3336 aquarium filter https://www.aliexpress.com/item/32731898939.html this filter is made for aquariums up to 150 l Not sure if you can get parts to your version of the filter. ...
trond hansen's user avatar
  • 19.6k
1 vote

Aquarium with mud production that clogs the filtration system

It is fecal material and decomposing plant material. That is why replacement filter elements are available. I use polyester fiberfill padding sold to make quilts; I cut it in rectangles to fit my ...
blacksmith37's user avatar
  • 1,844
1 vote

How to maintain a snail tank without a filter?

You need to find a way to get the surface water moving. You can use an aquarium airpump and an airstone or simply use a fan to blow air over the surface of the water. If you can limit the number of ...
trond hansen's user avatar
  • 19.6k
1 vote

8.0ppm ammonia spike that's been "in effect" for about a week or two

When things started to go wrong you did a few things right, like changing water and adding salt. Keep on changing water every two days about 20-25% until you get the ammonia down, you need to stop ...
trond hansen's user avatar
  • 19.6k
1 vote

Sponges for mechanical particle filters for aquariums

Coarse sponges are used on filter inlets as a strainer . Be sure to get "open cell" foam sponges. I have used them a few times in various filters as a final stage ( after fiber or other filter ...
blacksmith37's user avatar
  • 1,844
1 vote

My new goldfish is gasping for air

Gasping for air can mean a few things. First you want to check all parameters. You already checked ammonia, nitrite and nitrate. Check pH, hardness and temperature. Gasping usually means the ...
Theologin's user avatar
  • 241
1 vote

How is GFO reactor better than PhosBan medium in the filter?

GFO is a lot cheaper if you buy it in bulk which is why I would personally recommend it over other proprietary PO43- absorption mediums. I also have to agree with @Manuki, can you describe what ...
Jestep's user avatar
  • 3,093
1 vote
Accepted

How do I fix BAD betta fin tearing?

Go to the pet store and ask for some aquarium salt and ask for a liquid in a little bottle or little plastic fish called Revive. Put around a pinch of salt per 10 gallon tank and 5/10 drops for the ...
Sherish Macdonald's user avatar
1 vote

How many grams of ceramic rings do I need in my filter?

It is not possible to answer this question, there are too many variables. First of, all ceramic rings have different sizes and different manufacturers have different types of ceramic. Ceramic filter ...
trond hansen's user avatar
  • 19.6k

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