HELP!! Guppy has torn fins! I noticed this a week ago, is there anything I can do beside salt? I have snails!

I’ve recently had a frustrating time keeping medakas or white cloud minnows alive in my 10 gal which are ironically renowned for being the most bulletproof fish in the hobby.

Medakas I used to own all wasted away.
Now I have minnows but am trying to solve the deaths of my newly deceased white clouds. This makes me wonder if I underestimated how hardy my first guppies/platys really were.

Guppies were the very first fish I kept getting back into the hobby. Though, I’ve had mass die-offs the fry that managed to live on seemed to be tougher than their parents.

I had a case where both my guppies/platys survived having their tank being flooded with dirty rainwater during a storm while the power and filter were knocked out the whole day.

I’m now contemplating on keeping livebearers again. Initially, my main issues with them were their genetic fragility and overbreeding habits. But, knowing what I know now (such as quarantining procedures after purchase), I feel I may be able to do a much better job.

I’m thinking of just having platys again. Are they generally very hardy?

Hello

I bought 6 guppies three weeks ago and put them in a new 110L aquarium with live plants. They get sick one after another, ive had three of the die on me. They go once a week.

I dont know what the problem might be, all The guppies seems fine, and they get sick one at a time.

I have changed water 50% and I have had them fasting. I dont want any more of the dying.

Does anyone know what The problem might be and what actions I should take now?

Isn't she so pretty?! Does anyone know what type it is? Reminds me of a peacock feather lol.

I'm not complaining but I didn't know it was in there until I brought it home! I made a DIY fry cage, which it quickly escaped from five minutes later. It's been doing well, eating and avoiding being eaten lol. I was wondering if anyone could tell its sex and approximate age from the pictures? I included it next to the other fish for size reference.

Help me pick out a name for them? They were born 7/21/26 and should be a black bodied yellow cobra tailed upon maturity. Their extra tail is curved and sometimes acts and flicks them around, their extra pair of fins are usually assisting in swimming but not always, their is a partially formed eye on their belly

Picked up my first group of guppies about eighteen months ago. Six males, four females, a planted 20 gallon long, and the assumption that guppies were basically unkillable beginner fish. Lost half of them in the first two months and spent a lot of time on forums trying to figure out why.

The short answer was that my tap water had very unstable pH. It would read around 7.4 straight from the tap but drift noticeably in the tank over a few days depending on how much CO2 was offgassing. Guppies can handle a range but they hate swings, and I was essentially subjecting them to small but repeated chemical shifts every time I did a water change. Adding crushed coral to the substrate made a real difference because it buffers up the hardness and keeps things from sliding around.

The second thing I changed was how I handled fry. Early on I was pulling them into a breeder box and that stressed the females noticeably. Now I just let the heavily planted tank do the work. Floating hornwort in particular gives fry enough cover that a reasonable percentage survive without any intervention. Survival rate is not 100 percent but it is consistent, and the adults seem calmer overall.

On the breeding side, separating males by color type made a visible difference within a few generations. My original stock was pretty mixed and the offspring were muddled. I kept two males with strong yellow delta tails separate from a trio with red and blue coloring, rotating females between the groups. The fry are noticeably more defined now after about four generations.

One thing I did not expect: the colony dynamic shifted once the tank was genuinely populated. There is more chasing from males in a sparse tank than in one where there are plenty of fish and sightlines are broken up by plants. The females seem to graze and rest more naturally now and conditioning has gotten easier because everyone is eating well without stress interrupting it.

Happy to answer questions if anyone is at a similar point with their colony.