Greetings everyone,
My name is Victor and I'm new to this hobby. English is not my first language so please bear with my broken thread, I need help in fixing some non-fatal but still serious tank problems.
I settled up a new fresh water tank for a betta a while ago, it holds about ten gallons of water (the tank is bigger than that but I have tons of substrate in it) in my bedroom near the window, since it is going into cold season the water temperature is around 23C (74F) with a slight drop at night (the tank is right in front of a radiator that will be turned on in winter so I can probably save myself an extra heater). The tank don't get a lot of sunlight since the window is facing north, but I managed to put some light on top of it with a combination of table lamp and small aquarium light. The lights are set on a timer from 8 in the morning to 8 at night, combined with natural lighting I think it is enough for what's inside.
Regarding filtration system, which is a shame to talk about, I tried to build an airlift system that uses substrate to filter most of the waste, but failed inevitably realizing that I will never get enough air for the cycle to run properly. Fixing the half broken filter system is another topic that I won't cover here, I do have a plan and I will run with it later. For now, let's just say that there is no physical filtration and it barely kept nitrate-eating bacteria alive.
Which is probably what is causing the water problem right now.
For water I use dechlorinated tap water straight from bath tub. I use some IDK brand of water treatment stuff that is said to be used in fish keeping. I tested the water before use, and it shows no chlorine and no ammonia after treatment. I used these water every time during water change.
For the occupants of the aquarium, I chose neon tetras and shrimps (various types) to accompany the betta, I made sure to put the shrimp and tetras in first, waited a couple of days, then the betta. I kept a close eye on all of them, and aside from occasional harassment of shrimps from the betta (just the betta swimming around seems to be scary as hell for the shrimps) and some chasing between tetras, I can see no serious conflicts between all the tank mates. Everything seems to be pretty happy for the first three days.
When the betta was put in, there were 12 tetras and at least 3 shrimps inside the tank. 11 of the tetras were from the same store while an extra one from an older tank somewhere else.
The first fish death comes within the first week, when I am still tuning the settings of the auto feeder. I saw the left over of an once-tetra on the bottom of the tank with most of the body intact. I thought it was the single one tetras from the separate tank that got bullied and killed by other tetras at first, but the second death followed two days after. This time the body is eaten to the head by the betta, I tried to check the video record of the tank to see what caused the death, but I can only confirm that the tetra was mostly intact and in the bottom of the water when dead, then floated to the surface and got eaten by the betta.
Then the tetra died off one by one till there are only five remain, and the dying stopped (from the second or third death on I stopped the auto-feeder, and now they all got the starving treatment). during this period I have limited access to the tank so I can't even find and clean up the remains. Due to this, the water went from this:
to this
and it got way worse than what is shown on the picture. This morning, I had to do a 1/3 water change because I can't even see the log in the water. The coloring of the water is a foggy yellow-brown atm, and water change seems to have little to no effect what soever. It seems that the fishes are still quite okay, since the water is still zero ammonia and zero nitrite (probably by the help of whatever is blooming in the tank).
So I got few questions.
How did the tetra die? overfeeding? bullying? the betta seems to be behaving quite nicely when I have eyes on him.
What is happening in the tank? will a better-working filtration system fix it?
Is the silicon sealant (when not dry) safe for the tank? or should I move as much things out as possible when working with it, I don't have any extra tank to work around with, and I feared that the movement will cause death, but if it is fully necessary I will try and find a way.
My name is Victor and I'm new to this hobby. English is not my first language so please bear with my broken thread, I need help in fixing some non-fatal but still serious tank problems.
I settled up a new fresh water tank for a betta a while ago, it holds about ten gallons of water (the tank is bigger than that but I have tons of substrate in it) in my bedroom near the window, since it is going into cold season the water temperature is around 23C (74F) with a slight drop at night (the tank is right in front of a radiator that will be turned on in winter so I can probably save myself an extra heater). The tank don't get a lot of sunlight since the window is facing north, but I managed to put some light on top of it with a combination of table lamp and small aquarium light. The lights are set on a timer from 8 in the morning to 8 at night, combined with natural lighting I think it is enough for what's inside.
Regarding filtration system, which is a shame to talk about, I tried to build an airlift system that uses substrate to filter most of the waste, but failed inevitably realizing that I will never get enough air for the cycle to run properly. Fixing the half broken filter system is another topic that I won't cover here, I do have a plan and I will run with it later. For now, let's just say that there is no physical filtration and it barely kept nitrate-eating bacteria alive.
Which is probably what is causing the water problem right now.
For water I use dechlorinated tap water straight from bath tub. I use some IDK brand of water treatment stuff that is said to be used in fish keeping. I tested the water before use, and it shows no chlorine and no ammonia after treatment. I used these water every time during water change.
For the occupants of the aquarium, I chose neon tetras and shrimps (various types) to accompany the betta, I made sure to put the shrimp and tetras in first, waited a couple of days, then the betta. I kept a close eye on all of them, and aside from occasional harassment of shrimps from the betta (just the betta swimming around seems to be scary as hell for the shrimps) and some chasing between tetras, I can see no serious conflicts between all the tank mates. Everything seems to be pretty happy for the first three days.
When the betta was put in, there were 12 tetras and at least 3 shrimps inside the tank. 11 of the tetras were from the same store while an extra one from an older tank somewhere else.
The first fish death comes within the first week, when I am still tuning the settings of the auto feeder. I saw the left over of an once-tetra on the bottom of the tank with most of the body intact. I thought it was the single one tetras from the separate tank that got bullied and killed by other tetras at first, but the second death followed two days after. This time the body is eaten to the head by the betta, I tried to check the video record of the tank to see what caused the death, but I can only confirm that the tetra was mostly intact and in the bottom of the water when dead, then floated to the surface and got eaten by the betta.
Then the tetra died off one by one till there are only five remain, and the dying stopped (from the second or third death on I stopped the auto-feeder, and now they all got the starving treatment). during this period I have limited access to the tank so I can't even find and clean up the remains. Due to this, the water went from this:
to this
and it got way worse than what is shown on the picture. This morning, I had to do a 1/3 water change because I can't even see the log in the water. The coloring of the water is a foggy yellow-brown atm, and water change seems to have little to no effect what soever. It seems that the fishes are still quite okay, since the water is still zero ammonia and zero nitrite (probably by the help of whatever is blooming in the tank).
So I got few questions.
How did the tetra die? overfeeding? bullying? the betta seems to be behaving quite nicely when I have eyes on him.
What is happening in the tank? will a better-working filtration system fix it?
Is the silicon sealant (when not dry) safe for the tank? or should I move as much things out as possible when working with it, I don't have any extra tank to work around with, and I feared that the movement will cause death, but if it is fully necessary I will try and find a way.
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