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Fishyfishfish Fishyfishfish
  • Quite a regular
  • Quite a regular
  • Posted on: 13/10 7:23
Re: Fishless cycle is just not working, guidance needed.... #61
Quick update - I've just tested the tank and ammonia is the same as it was 24 hours ago, so I think the cycle has definitely failed. The question I have, and I think I know the answer, is has the beneficial bacteria that has built up now died off?

I think my main issue here is that nitrates were severely high (in part due to me only doing a 50% water change when I last retried to kickstart the cycling process), so that affected the cycle and the test results. I'm also not sure dumping the whole bottle of beneficial bacteria into the tank was a smart move either.

Unless the bacteria is somehow still alive I will be shutting the tank down completely and starting again.


mrschristmas mrschristmas
  • Just popping in
  • Just popping in
  • Posted on: 12/10 16:46
Re: 100l tank community #62
Don't know how to edit the first post - that was my first list, which I have since seen is not brilliant.

The current list is:

7 cherry barbs
1 pearl gourami
1 sailfin molly
1 balloon molly
1 marble molly
1 black swordtail
1 glame guppy



http://www.aqadvisor.com/AqAdvisor.ph ... short&AqSearchMode=simple

Attach file:



png  AquStockImage.png (28.37 KB)
22628_5da202dd8e3a0.png 550X190 px


mrschristmas mrschristmas
  • Just popping in
  • Just popping in
  • Posted on: 12/10 14:33
100l tank community #63
This is what I'm thinking of going for -

6 dwarf rasbora
1 flame guppy
1 marble mollie
1 silver flying fox (for the algae at the top of the tank)
2 nerite snails (for the algae at the bottom of the tank)

Is this an ok community? As far as I can work out, it's not too many fish for the size, they all need the same temperature, and they are all ok with live plants. I think they are compatible?
Is there a specific gravel I should chose/avoid? And specific plants?


mrschristmas mrschristmas
  • Just popping in
  • Just popping in
  • Posted on: 12/10 12:23
Re: Total begginer! #64
Thank you.

I have had a look and found a 100 l tank on facebook marketplace.

It looks in good condition, and has everything but a light, so that looks like my best option.

So that gives us much more space.

I'm going to do some research and come up with a plan for what I'd like to stock it with.


Fishyfishfish Fishyfishfish
  • Quite a regular
  • Quite a regular
  • Posted on: 12/10 12:18
Re: Fishless cycle is just not working, guidance needed.... #65
I dosed it to roughly 2.5ppm so if it is being processed it’s incredibly slow.


Fishlady Fishlady
  • Tropical Moderator
  • Tropical Moderator
  • Posted on: 12/10 10:00
Re: Fishless cycle is just not working, guidance needed.... #66
What level did you dose the ammonia to?


Fishyfishfish Fishyfishfish
  • Quite a regular
  • Quite a regular
  • Posted on: 12/10 8:44
Re: Fishless cycle is just not working, guidance needed.... #67
Quick update - I tested ammonia and nitrite just and ammonia is still showing I’d say between 1&2ppm, whereas nitrite is showing at 0ppm. Nitrite cannot be getting processed because the ammonia would have been consumed by now so has the cycle stalled?


Fishlady Fishlady
  • Tropical Moderator
  • Tropical Moderator
  • Posted on: 11/10 20:19
Re: Total begginer! #68
A heater will only cost a few pounds so not much more. The 1 inch per 4 litres "rule" is not very clear. It only applies to small, shallow bodied fish for one thing and doesn't work for many species. For example, you couldn't keep a 12-inch fish in 48 litres of water. Then there's always a minimum tank size to consider for any given species which varies with how active they are, how much waste they produce and how much territory they need. So you start with the minimum tank size for a specific fish, and then stock that to no more than 1 inch per 4 litres, but only for small fish. For zebra danios for instance, the minimum recommended tank is 3 feet long so about 100 litres because they need a lot of space to swim and need to be kept in quite big groups to prevent them being too aggressive with each other.


mrschristmas mrschristmas
  • Just popping in
  • Just popping in
  • Posted on: 11/10 16:55
Re: Total begginer! #69
The ratio I was given was 1 inch of fish for every 4 litres. Is that wrong?


mrschristmas mrschristmas
  • Just popping in
  • Just popping in
  • Posted on: 11/10 16:27
Re: Total begginer! #70
Thank you, I'll be giving her the tank on Christmas Day so she can be part of preparation, including cycling. I want her to be aware of what is involved in having pet fish.

Does adding a heater make the whole thing much more expensive?



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