Danios & Minnows

Hi, In my tank I have 2 danios, 1 ghost catfish, 2 mollies, 2 tetras, and one baby ballon belly Mollie. One of my Danios constantly chases the other. I can't tell if they are playing or fighting, because they aren't hurt in any way, but the one getting chased is constantly hiding. One of my tetras has picked up similar behavior. The danio that is chasing the other is significantly bigger than the smaller one. Plz help, thanks

I got 3 zebra danios and 2 leopard danios at petco and in about a day of having them one died. the next day another dies with a strange white spot growing on it. it was not like cotton through which I hear is a disease. my tank is a 20 gallon and before I introduced the new danios I had 3 pearl danios and 2 plecos and the were doing very well and seemed to be in perfect health. well one of my pearl danios died after the new fish came to no obvious elements. and now my 2 plecos died.the same way

What types of plants are suitable for a 24L tank with 2x shrimp, 3x snails, 2x Platies, 5x danios?

I am planning to put either tetras or danios in a 10 gallon. How can I tell if their female or male? Im not wanting to breed them so what do I do of they lay eggs? Am I suppose to move the eggs to a different aquarium and if I do will they still hatch?

I have 2.5 gallon bowl ...which fish breed can i kept in it

Hi! I plan to move my goldfish to a 45 gallon, and I’m curious about what kind of fish dan go with them. I currently have a zebra danio with them in the 20 gallon I am currently keeping them in, but I found out that zebra’s require a heater while goldfish do not. And even though I have kept them together for a long time, I don’t want the danio to suffer. Another dumb question but would separating them cause anything, like anxiety for the fish, or am I just being a bit paranoid.

what kind of fish are these? and would they be good with a male betta

What can be kept with goldfish?

How to introduce betta fish to neon tettra, guppies

We have four cardinal tetras, three glo danios, three glo tetras and a albino Cory cat. They are all the type to only get an inch to two inches long and so we have them in a twenty gallon tank. Have gravel and silk/plastic/resin/and live plant/decor and proper filter/heater/air. Also have changed filter once a month, siphoned 25% water/debris out every two weeks using water conditioner but don't know why we have murky water and how to remedy this...

I have 2 glo fish what kind of tank should I get?

Have 60 gal tank with 2 largish Ryukin goldfish, doing well together in this tank for several months. I added 3 times different smaller Ryukin from different sources, acclimated by floating bag method, put in the tank with the larger Ryukin. All new fish died within 3-5 days, w/ signs of swim bladder problem - not remaining upright, then dies. Water tests all zeros, using Safe, API proper ph 7.5 & bacteria. Temp 78. Tank cleaned often.. Eat soaked Hikari sinking mini pellets, peas. Ideas?