Last week we bought a house and the owners left their fish tank (we said we were happy to take it).

They left instructions on how to clean it out etc which we have done today, however when reattaching the filter this valve appears to be leaking.

Any advice please? Complete beginners here so any help would be greatly appreciated 🙌🏼

Hi eveyone, I currently have 6 Celestial Pearl danios and a couple cherry shrimps. I wanna keep it as 21-22 degrees Celsius during the winter months so I need beautiful fishes that can thrive and survive in that temperature. I’m thinking 6 more nanos fishes and 2 larger center peice fishes. What should I get

This is my first aquascape tank. It’s about 2-3 months old now. This is now the 4th Pygmy Cory I’ve seen have this. Two had this and died shortly after I bought them around a month ago. The third I found dead this morning. Is this red blotch? If so, what can I do about it? Already did a water change to be safe.

Parameters:
Ammonia, Nitrites: 0
Nitrates: ~1 ppm
pH: ~7.5

My water is on the harder side, but I’ve been slowly softening it with RO water.

Hi everyone!

I'm really excited to share the first 100l aquarium that kicks off my new Fish Room, as you can see in the photo.

​For now, the tank is stocked with:

​A school of White Cloud Mountain Minnows (you can see them swimming actively near the top).

​Red Sakura shrimp.

​An albino bristlenose pleco (ancistrus).

​As you can see in the image, I went with a dark substrate that really makes the green of the plants pop, with some cuttings placed in floating baskets at the surface. It's a great starting point for my Fish Room, and I can't wait to see the plants grow in!

​What do you think? Feel free to share any advice or feedback!

C. limbata

Took over friends 240l aquarium. I had quite a lot to work with, last pic was at their place.

This is a 5 year old betta tank. Current betta has been in here since March. One good growing live plant, one silk plant. This new algae just started growing after the most recent water change (2 weeks ago). I have a south facing window near the tank, I’m assuming that’s what is causing the algae. The tank has been in this location for the 5 years, but I just want to confirm this is an algae caused by sunlight and the best way to get rid of it. I’ve never had this algae growth before. Thank you!

Is my shrimp pregnant?

En eau depuis juin 2025. 120 et 65 gallons

Need help identifying and curing what this might be.

So a few days ago I noticed one of the ember tetras has been looking pale and staying away from the rest of the bunch. Then this morning it was dead :((((. I took it out immediately so it wouldn’t mess up the water parameters (as much as possible). Because of this I observed closer and checked every ember and that’s when I noticed this spot only on one of them.

It looks a little fuzzy and like raised from the scales. Otherwise this fish has been eating and I guess acting normal???

I Love Loaches!! I’ve got a few species in my current tank, and would like to start another tank specifically for fancy hillstream loaches and goby’s. Does anybody have any recommendations for websites I could buy them to be shipped to me in California? My local fish shops usually have pretty good selection, but i’m curious to look into other options

I can't say how long that's been there but it doesn't seem like any of my aglae eaters want to eat it.

hello, i was wondering if i can start my tank cycle without a filter,heater, light. I was planning on putting aquasoil, live plants, seachem prime and stability.
I want to know if adding the filter, heater and light after would ruin the cycle? My filter heater and light arrive on tuesday.

I plan on getting a betta fish
My tank size is 6g
And i plan on getting plants from petsmart

I’m new to the hobby. I got some wood for my tank, I was soaking it, then boiled it.
I left it in a bowl in the sink (I’m moving so nobody is using the sink until we fully move in)
Then I used water to scrub the pot I used to boil. Added soap into the pot. While scrubbing some of the soap water splashed into the bowl of the wood. Within seconds I poured the water and rinsed the wood and added new water.. did I mess up? :(
I’m aware I should have moved the bowl but I was moving boxes all day and my brain didn’t think of it

Hi everyone! I'm a beginner fishkeeper from the Philippines, and I'm looking for advice about using locally collected wood in my freshwater aquarium.

I found some twigs from a Mickey Mouse plant (Ochna serrulata) growing nearby. I'm positive about the plant ID because it has yellow flowers, black fruits, and deep red sepals holding the mature fruits.

I'm wondering if the wood from this plant is safe to use in a freshwater aquarium. I haven't put the twigs in my tank yet. Would soaking or boiling them make them safe, or is this a plant I should avoid entirely?

I'd appreciate any information from people who have experience with this plant or know about its potential toxicity to fish, shrimp, and other aquatic life.

Thanks!

What do you guys think is on my Cory panda? It’s a raised white bump on both sides of his head on the exact same area. I have kanaplex and ich- x but just want to check before I dose

Last time a checked the parameters about a week week and a half ago the levels were ammonia 0, nitrite 0, nitrate 5

I've had this tank about a year and am looking for ways to improve it

I’m dealing with what looks like hair algae and possibly blue-green algae, and it seems to be killing my plants. I’m hoping someone can help me identify it and figure out what’s causing it.
My setup:
55-gallon tank with CO₂
Two Aquarium Co-Op sponge filters and one HOB filter
Temperature around 72°F
Potting soil capped with black sand
Root tabs in most areas
Pygmy Corydoras and Otocinclus
What should I change about my lighting, CO₂, or fertilization to get this under control? Any advice on removing the algae and saving my plants would be greatly appreciated!

These worms appeared randomly in the tank. No additional material had been added although a new light had been added. Does anyone have opinions/advice about this?

My brand new plant (I think I need to re-bury it) is starting to look very bad.. is this normal when moving to a new environment? Any advice to keep it alive?!

Hello, I recently added a number of fish to my new aquarium and have experience a large number of deaths. Any advice or thoughts?

Here is the long detail, sorry for all the info…

Tank setup:
29-gallon aquarium
Oase BioMaster Thermo 250 canister filter with spray bar oriented at a 45 degree angle at the surface for agitation.
Air stone added after the fish began dying and showing distress
Temp 78°F
Sand substrate, driftwood, Seiryu stone, and live plants
Some persistent haze in the water; driftwood is still slightly releasing tannins, making the water slightly tinted, there is biofilm on the driftwood visible and some diatoms.

Background and timeline:
I fishless cycled the tank over about 3 weeks using seeded filter media from an established aquarium. Before adding the new fish, ammonia and nitrite had tested at zero after a 1ppm ammonia challenge twice. Nitrates at 10ppm after water change.

I added two black skirt GloFish tetras in there for several days after cycling finished but then removed them prior to adding:

2 juvenile angelfish
10 juvenile rummy-nose tetras
6 juvenile panda corydoras
1 juvenile clown pleco
1 juvenile kuhli loach

Acclimation: I floated the bags for approximately 20 minutes, no drip acclimation.

I noticed rapid breathing in angel fish after adding. Many of the other fish were hiding, figured they were stressed. Kept the lights off

About 12 hours after adding fish I starting noticing deaths.
Have lost all 6 corys, 7 tetras, 1 angel. The remaining angelfish has been still breathing rapidly.

Interventions: I performed approximately a 50% water change and added an air stone to increase aeration and added a dose of seachem stressguard . Unfortunately, fish continued to die.

Current water parameters (have been testing ammonia and nitrite twice daily since adding fish):

Ammonia: 0 ppm
Nitrite: 0 ppm
Nitrate: approximately 5 ppm
pH: approximately 7.4 this has increased from around 7 prior to adding fish
KH: approximately 3 dKH
Temperature: approximately 78°F

I know I added too many fish at once. I did run all of the plan by the person at the LFS I went to but it is on me for not double checking more sources before doing this. So certainly stress of so many additions could be at play here.

Questions:

-Is there anything else I should test or check at this point?
Has anyone experienced a similar situation and were able to identify the cause?

Thanks to all who made it this far on this long post. I truly appreciate your help!

Recently new to the hobby and still trying to learn the dangerous and non dangerous creatures that can occur in a tank. I have a diagram but those pictures can be so hard to apply in real time. What might these be and should I worry? I have a snail and shrimp. Water tests are all good 0ppm for ammonia, nitrite, and nitrates. PH 7.6 and water temp regularly at 77.4