Nitrate Question for Our Fishlore Science Specialists 55 Gallon Tank 

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bolivianbaby

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I lost one of my fancy goldfish (the buddha-bellied, bum wiggles when they swim) fancy goldfish. Before I lost him, my nitrates were 10 each week. 25% water changes weekly for maintenance. Everyone is young, I'm guessing under a year old.

After he passed, I added 6 bronze corys and two SAE's.

Now my nitrates are 5 weekly. Yes, I shake the nitrate #2 bottle, throw it across the room, bang it on my head, etc. I've reduced my water changes to 10% weekly, just enough to keep fresh minerals in the tank.

Are my corys and SAE's utilizing more waste than they produce or what is going on? I haven't reduced the amount I feed, in fact, I've added cory pellets to the daily feeding.
 

lorabell

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I hope u get an answer...but I KNOW ITS NOTHING U DID.....I just think sometimes these poor little fish(all kinds) are just bred improperly and who knows what they came from.....so no matter what WE do...unfortuneatly its already too late......sorry for your loss....my GF just lost a mandarin.....he was fine (and she has pods) I swear it was because her tank conditions are impecable and the poor thing wasn't used to that
 

sirdarksol

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Goldfish are messy eaters. Also, the goldfish digestive system is extremely inefficient. I think it's one of the least efficient among fish. Cories, on the other hand, are meticulous eaters. They are likely eating food that would otherwise rot in the substrate. Food that rots produces more nitrogen than food that is eaten, so, despite being an addition, the cories are actually helping keep nitrates down a bit.
 
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bolivianbaby

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lorabell said:
I hope u get an answer...but I KNOW ITS NOTHING U DID.....I just think sometimes these poor little fish(all kinds) are just bred improperly and who knows what they came from.....so no matter what WE do...unfortuneatly its already too late......sorry for your loss....my GF just lost a mandarin.....he was fine (and she has pods) I swear it was because her tank conditions are impecable and the poor thing wasn't used to that
Thanks, Lori

sirdarksol said:
Goldfish are messy eaters. Also, the goldfish digestive system is extremely inefficient. I think it's one of the least efficient among fish. Cories, on the other hand, are meticulous eaters. They are likely eating food that would otherwise rot in the substrate. Food that rots produces more nitrogen than food that is eaten, so, despite being an addition, the cories are actually helping keep nitrates down a bit.
Hmmm, that's interesting information. I have two more bronze corys that I was going to add to the tank.

The research I've done says that fancy-tailed goldfish get to an average of 6" (round). Is this correct? I'm trying to figure out if I can increase my school of cories without sacrificing goldfish swimming space.
 
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Lucy

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I'm so sorry about your goldie
It really stinks to lose a fin baby.
 

sirdarksol

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bolivianbaby said:
Thanks, Lori



Hmmm, that's interesting information. I have two more bronze corys that I was going to add to the tank.

The research I've done says that fancy-tailed goldfish get to an average of 6" (round). Is this correct? I'm trying to figure out if I can increase my school of cories without sacrificing goldfish swimming space.
It depends on a lot of things. I've seen fancy goldies about the size of a softball. I think we all kind of underestimate how large all goldfish can grow until we actually put them in a huge pond (such as what Gremlin has done).
However, if kept in an aquarium, I think they will cap out at a bit smaller than what I've seen (maybe baseball size).
 
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