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I got my aquarium for free from a teenage kid. It came with gravel, so I used it. I have had my tank for years, but it never really worked well. My gravel has some weird marbles and glass beads in there. What is the chance there is something unhealthy in the rocks? I don't even know if the rocks...

Based on my research, I want to have a calm surface to minimize CO2 escaping. But at the same time, I want to have a choppy surface to dissolve oxygen. How do I navigate that? I have a HOB filter, so my water is always choppy. Could that be why my plants don't do well? Should I test the CO2...

My plants don't look healthy. But they don't look like any of the pictures online. There is no yellowing or pin holes or dark veins or whatever might indicate something specific. Some parts look healthy. Some parts have big chunks of black. It is a 10 gal tank with 3 brilliant rasboras.

I put tape over my light to prevent algae. The light burned through the tape. I guess I need a new strategy. My Nest thermostat has a presence sensing feature. When nobody is home, it goes into eco mode. I presume I could get a smart plug for my aquarium light and add that to the routine in...

What is this stuff? It seems to be growing around my java fern and choking it.

My gravel gets filthy. The siphon helps, but there is still crap everywhere. I have to take everything apart and wash the gravel and deep clean. Is that normal or should it stay clean indefinitely with water changes and filtration? Or do I happen to have very messy plants?

What should I do about all thus green stuff growing in my gravel? The siphon doesn't take it off. Should I scoop it out and try to clean it somehow? Throw it in the garbage and replace it? Will it go away if I fix the light or something?

I've had my 10 gallon tank for a while. It's doing okay, but it is kind of an eyesore. I got it for free from somebody. It's just a cheap tank with a waterfall type of filter and some rocks in the bottom. One of the bulb sockets is broken. I have three brilliant rasboras in there. For Christmas...

When I'm cleaning my tank, it stirs up a lot of garbage and makes the water cloudy for awhile. I was wondering if maybe I should do that intentionally between water changes to give the filter a chance to capture it and get that garbage out of there. Or is that just choking my fish with a bunch...

I just added a new swordtail to my tank a few days ago. I also have 3 brilliant rasboras and a cory catfish. It's 10 gallon tank. The swordtail is pulling long strings of poop. I've been feeding them flakes and the other fish are fine, but maybe the swordtail has different dietary needs? I...

How much water can I put in my tank? Right now, the water comes through the filter and down this little slide on the back of the tank right into the water. Will that adequately oxygenate the water or does the water have to actually fall down and splash into the water and make bubbles? Or...

What is this brown stuff that suddenly showed up on my glass?

I am 0/3 with my fantail goldfish in my first week. They all died. I feel like I have been very conscientious with conditioning the water and testing the water and changing the water and matching the temperature of the water. I'm wondering if it is the food. I have been giving my goldfish...

I've got 2 sons - 4 years and 5 months. I thought a fish tank would be fun and educational for them. My wife has been against the added life complication, but somebody gave me a tank for free and I just brought it home one day, so now we have a 10 gallon fish tank. I have no idea what I'm...