Water Changes with Fry? - Aquarium Advice

itafx · 02-21-2007, 11:58 PM

Are water changes hard on fry? How do you reduce their stress? Once I ended up with about 50 fry in my community tank. I wanted to raise them, but couldn't dedicate a 72 gallon for it, so I transferred them carefully to a 10 gallon at the same temp. After a few days they all died.

bs6749 · 02-22-2007, 10:42 AM

I have wondered this myself with some of my GBR fry that I have had and I think I know what I did wrong. I transferred them into a ten gallon tank that was recently setup and I used RO water and some cleaned PFS as the substrate. Therefore there were few if any microorganisms for the fry to feed on as I don't think that they could eat the egg yolk and other stuff that I tried feeding them. I would say that the biggest factor when moving a fish would have to be the water temp, especially with very young fish. How old was the tank that you had setup?

Mosaic · 02-22-2007, 02:37 PM

I agree with bs6749. I transferred krib fry to a recently setup 10g, and soon they all died. My latest batch I moved into my planted nano, and they are thriving. I think they really depend on the microorganisms, especially when small. I had no problems when moving them or doing PWC in their nursery tank. I think it's just a matter of food supply. If you want to move them into their own tank you should probably culture some infusoria for them.

What kind of fish are they?

itafx · 02-23-2007, 09:28 PM

Can I get a little help on acronyms? GBR?, krib?

bs6749 · 02-23-2007, 10:41 PM

GBR = German Blue Ram - A South American dwarf cichlid.

Krib = Kribensis (I think that is the spelling of it) - An African dwarf cichlid.

Jchillin · 02-23-2007, 10:55 PM

Quote:

Originally Posted by bs6749

Krib = Kribensis (I think that is the spelling of it) - An African dwarf cichlid.

Yes...your spelling is absolutely correct.

itafx · 02-23-2007, 11:18 PM

Thx! I'm learning. Today I graduated from "apprentice" to "advice regular".

itafx · 02-24-2007, 11:50 PM

I've been pampering 3 Giant Danio fry in a 10 gal for about 6 weeks. This morning 2 were dead and they were the 2 that had seemed the healthiest. They had grown to about 1/2 inch long and I thought I was out of the woods It was heavily planted with large pots and a few days ago I took the pots and cleaned off some BGA that had grown up.

I'm about to give up trying to raise fry in a 10 gal. It just seems to hard to keep a ecosystem going in such a small tank well enough to support sensitive fry.

BillD · 02-25-2007, 04:18 PM

I don't try to keep up an "ecosystem" in a fry tank. Frequent large water changes to keep the water clean. Fry are sensitive to unclean water. The amount of water and change frequency would depend on the tank size and number of fry. As an example, with 200 angel fry, in a 30 extra long (48") I would change 60% daily.

itafx · 02-25-2007, 09:38 PM

Wow! How do you keep enough "prepared" water on hand for that kind of daily volume? The only feasible way I can imagine to do 18 gallons / tank / day is to use faucet water.

02-21-2007, 11:58 PM	#1
itafx Aquarium Advice Freak Join Date: Feb 2007 Location: Virginia Posts: 402 Images: 12	Water Changes with Fry? Are water changes hard on fry? How do you reduce their stress? Once I ended up with about 50 fry in my community tank. I wanted to raise them, but couldn't dedicate a 72 gallon for it, so I transferred them carefully to a 10 gallon at the same temp. After a few days they all died.

02-22-2007, 10:42 AM	#2
bs6749 Aquarium Advice Addict Join Date: Jun 2006 Location: Lawton, MI Posts: 1,298	I have wondered this myself with some of my GBR fry that I have had and I think I know what I did wrong. I transferred them into a ten gallon tank that was recently setup and I used RO water and some cleaned PFS as the substrate. Therefore there were few if any microorganisms for the fry to feed on as I don't think that they could eat the egg yolk and other stuff that I tried feeding them. I would say that the biggest factor when moving a fish would have to be the water temp, especially with very young fish. How old was the tank that you had setup? __________________ 100G Discus Tank, 55G Planted RCS Tank, 29G Angelfish Tank w/Breeders, 29G Class N Endler Tank, 10G CRS/CBS (S+, SS) Tank, 10G Yellow Shrimp Tank, 10G Snowball Shrimp Tank, and a breeding experiment with ghost shrimp in my other 10G tank.

02-22-2007, 02:37 PM	#3
Mosaic Aquarium Advice FINatic Join Date: May 2006 Location: Georgia Posts: 646 Images: 3	I agree with bs6749. I transferred krib fry to a recently setup 10g, and soon they all died. My latest batch I moved into my planted nano, and they are thriving. I think they really depend on the microorganisms, especially when small. I had no problems when moving them or doing PWC in their nursery tank. I think it's just a matter of food supply. If you want to move them into their own tank you should probably culture some infusoria for them. What kind of fish are they? __________________ I just want my planted tanks to be perfect. Is that so much to ask? 55g: (Mostly) African riverine species: Alestes Chaperi, breeding pair of Kribs, and rhino pleco 30g: Newly established reef tank 10g: Planted but fishless 5g: Unplanted with various snail species 2.5g: Heavily planted with betta.

02-23-2007, 10:41 PM	#5
bs6749 Aquarium Advice Addict Join Date: Jun 2006 Location: Lawton, MI Posts: 1,298	GBR = German Blue Ram - A South American dwarf cichlid. Krib = Kribensis (I think that is the spelling of it) - An African dwarf cichlid. __________________ 100G Discus Tank, 55G Planted RCS Tank, 29G Angelfish Tank w/Breeders, 29G Class N Endler Tank, 10G CRS/CBS (S+, SS) Tank, 10G Yellow Shrimp Tank, 10G Snowball Shrimp Tank, and a breeding experiment with ghost shrimp in my other 10G tank.

02-25-2007, 04:18 PM	#9
BillD Aquarium Advice FINatic Join Date: Jun 2005 Location: Whitby, Ont,Canada Posts: 912	I don't try to keep up an "ecosystem" in a fry tank. Frequent large water changes to keep the water clean. Fry are sensitive to unclean water. The amount of water and change frequency would depend on the tank size and number of fry. As an example, with 200 angel fry, in a 30 extra long (48") I would change 60% daily. __________________ Join a fish club. Don't have one in your area? Start one.

02-23-2007, 09:28 PM	#4
itafx Aquarium Advice Freak Join Date: Feb 2007 Location: Virginia Posts: 402 Images: 12	Can I get a little help on acronyms? GBR?, krib?

02-23-2007, 11:18 PM	#7
itafx Aquarium Advice Freak Join Date: Feb 2007 Location: Virginia Posts: 402 Images: 12	Thx! I'm learning. Today I graduated from "apprentice" to "advice regular".

02-24-2007, 11:50 PM	#8
itafx Aquarium Advice Freak Join Date: Feb 2007 Location: Virginia Posts: 402 Images: 12	I've been pampering 3 Giant Danio fry in a 10 gal for about 6 weeks. This morning 2 were dead and they were the 2 that had seemed the healthiest. They had grown to about 1/2 inch long and I thought I was out of the woods It was heavily planted with large pots and a few days ago I took the pots and cleaned off some BGA that had grown up. I'm about to give up trying to raise fry in a 10 gal. It just seems to hard to keep a ecosystem going in such a small tank well enough to support sensitive fry.

02-25-2007, 09:38 PM	#10
itafx Aquarium Advice Freak Join Date: Feb 2007 Location: Virginia Posts: 402 Images: 12	Wow! How do you keep enough "prepared" water on hand for that kind of daily volume? The only feasible way I can imagine to do 18 gallons / tank / day is to use faucet water.

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