aggressive behaviour

About three weeks ago I bought two Yoyo loaches since I had been looking for them and they were the only ones left. They seemed fine at first, but when I tried to reintroduce a fish into the tank, one of them started going out of its way to attack it. Even after I took the fish back out, that...

We not long ago got 2 opaline gourami. One female (pearl) and one male (opal). Male seems to chase the female around a lot. It is more around feeding time. I don’t know if he does it at night, or if it’s just when he thinks there is food. Is there any advice or signs to look for? the stuff...

I absolutely hate to think this but I honestly don’t know what else to do anymore besides just start over. I’ve made a lot of mistakes and really think they’re suffering for it and at this point, I don’t know what to do anymore. My only main problem rn is that I just don’t know how to go about...

Okay so I’ve always known mollies tend to be aggressive. Especially the males. But I have been able to fix this situation in the past and wanted help sexing my mollies! If they are males, then i have too many males and i need to replace two of them with females (i have one female molly and one...

I've recently added 13 Odessa barbs to an existing 12 peppered cories, and the barbs have since made the tank their own. Which is perfectly fine. I'm very fond of corydoras, and before the barbs, they were thriving and spawning. But I'm now noticing some of the cories have slightly nipped fins...

I'm having a problem with aggressive male mollies in our tank. To cut a lot by story short, we started with 2 mollies and now have 12 females and 8 males. So they've been upgraded to a 240L tank. Everyone is in the same tank, with a divider to separate them. The males are aware that females...

A fully cycled planted 100L tank with: 50+ cherry shrimp 1 betta 8 male guppies (I have way too many guppies as the first four female guppies I got actually had a male (in the tank at store) so from that I’ve now got too many guppies to count so when I could tell the males I’ve put them in a...

I have been having some trouble with platies in a 10 gallon tank. About four months ago I went out and got for platies just for fun because I was considering getting into fish keeping. At the time I did not know but I ended up discovering that two of the platies were male two of them were female...

Hi everyone Is it normal for all fish to have aggressive days? I have had my 120litre tank set up for 5 months now with no real problems yet. Doing weekly water changes and feeding a variety of foods. Water levels Ammonia - 0 Nitrite - 0 Nitrate - 20ppm Ph - 8 (our tap water is 7.8) Kh- 178 GH...

So I have 4 Zebra Loaches in my 55g tank and they all seemed really happy 1st week or two. Recently, for a couple of days now, I haven’t been able to find one of them even when feeding. Also two of the three that I do see everyday are fighting...they have just started doing this about the same...

Hi all, 77L 60cm x 30cm x 45cm Fully cycled 0/0/7 27°C PH 7 Hardness 56ppm 4 x Cory cats 1 x Dwarf Gourami 10 x Neon Tetras 2x make Guppy’s (I know these like harder water but from speaking with a local breeder they have never had an issue with the local water supply hardness and keeping...