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Hi I have a 30L biorb which had guppies in it. Sadly they are all dead now and as I will be travelling and away from home in the next few weeks I think I should perhaps find an easy low maintenance solution to keep it going until I'm back when I can restock. What do you think? Shall I just add...

All, sorry about the silence. I thought the pandemic had ended but since I last wrote to you, I have just one guppy still alive in the tank and it doesn't look like it is well... I'd expect it to die too, soon, sadly. What would you recommend I do before getting any new fish in?

I don't think I can kill it... still breathing but still bent and not moving much - was floating at the top of the tank. Now it's been moved into a smaller container on its own. I will monitor and see if any improvements.

Good morning all! Quick update for you: everyone still alive! Salt seems to have worked as a tonic: the struggling fish is back up although all crooked - see photo. Let's wait and see shall we? I assume there is not much else to do, but let me know if otherwise! Thank you.

ok, I guess it'll probably be dead by the morning. It's been lying on the gravel for a few hours now...

Thanks Colin, will do that now. Should I take the dying fish out and put it in a smaller container with tank water?

hopefully it'll work now! sorry - I'm not used to this!

Mmmmh, not sure if this any better! The video was taken this morning Here are the pictures as well

Here are some pictures just taken of the 3 survivors. It seems like the one who was struggling this morning is now almost dead by the shell (still moving a little). I will take it out as soon as it's dead and look into the salt thing next! Thank you.

OMG this scares me right off! I'm 8 months pregnant so I really don't want to be messing about with a potential pathogen I could get from my fish!!! What do I do? Take this one out of the tank and wait until it's dead? Do I just put it in a small container with tank water? I hope you are wrong...

I have made a 30 secs video but it won't let me post it :( - it says it is too big.

just siphon!

Hello Colin, thanks for your reply. Sorry - I cannot post a video or photo at the moment as don't have a suitable device connected to this computer but will try later. In answer to your questions: Have you added anything to the tank in the 2 weeks before they started to die? No - the last...

Thanks Gary. This sounds scary. To be honest I had not noticed any changes in the bodies of the other fish before they died, aside from the fact that they were not swimming much and were 'resting' on the gravel before they died. The one I mentioned before is still swimming around a little but...

yes, I do have hard water. The calcium carbonate is 272 ppm and it is classed as hard water indeed.

Hi - I didn't note them down, but ammonia, nitrite and nitrate were all in the clear range as advised by fish shop when I bought the tank years ago. Ph would be in the 7 region, same as fish shop as it is in my area. Sorry I can't be more specific, but I have had guppies before the tetras and...

Hello, I have a Biorb 30L tropical tank, well established (had it for 8-9 years now). In April 2022 I bought 7 guppies to replace the tetras I had for years who had slowly died. Since then, I am now down to 4 fish and one is clearly not well - I'm guessing it will probably be dead by tomorrow...

Good points well made @Myraan. I did think about this too but giving my lack of knowledge, I really don't know what would be the best option here. Agreed that if the tank is not suitable for tetras then I shouldn't get more. However (and I'm no expert here) I would think that - whilst this is...

It was meant as a descriptive word, not a judgement. He lives in a tank on his own. He is lone meaning solitary / with no company. Anyhow, there is little I can do about the water but I can definitely get him some company. Thanks.

Oh, so it seems like the tetra thing was a total no-goer (thanks pet shop employee!). I live in London, UK and water is the hardest! 🤯

Thanks - this is very helpful and I shall bear that in mind re: pet store employees... What do you think about mixing tetras and guppies? Could I go 4 and 4? All male?

Hi, thanks for getting back. I am not sure - I have attached a picture of the little guy. Although I have had the tank for 10 years or so, I am no expert and I took the advice of someone at the shop when I got my tetras a few years ago. What do you think? When I had guppies they lived happily...

Hi everyone, I'm new to this forum and looking from some advice. I have a lone tetra in a 30L freshwater tropical tank. He has been on his own for probably about a year now. I had 6 of them in there but in time (5 years or so) the other 5 died and with lockdown and the rest of it, I didn't get a...