Why 24hrs

[atmmachine816]

Hey I use a hatchery kit made by San Fransico Bay Brand to hatch baby brine shrimp and the instructions say you can only collect baby brine shrimp up to 24 hours after they start hatching, why is this? They are still hatching 3 days later, is it because they go bad or something or is it just one of those things when they want you to buy more of there products?

Thanks

Austin

 

[blitztidus]

I don't get your question too well, do you think you can reword it

 

[atmmachine816]

Ok I hatch baby brine shrimp and the instructions say you can only collect brine shrimp for up to 24 hours. Well I have been collection them for 3 days now and I'm wondering why they say this.

 

[blitztidus]

Ah, I get it now. It is mainly so that they can get more money off from you.

 

[atmmachine816]

That's what I thought

 

[Ptarmigan]

.

 

[Tolak]

Once they hatch they have, like many egg laying fish, a yolk sack. They live off of this for a couple of days. While they have the yolk sack, they have a higher nutritional value, when they start to use the yolk sack up the nutritional value drops.

Another reason is like most all fry, they grow pretty quickly at first. After a couple of days they may be a little too big for really small fry to eat. For larger fry this isn't a problem at all.

Now that you have the bbs hatchery, buy the eggs from Brine Shrimp Direct. A pound of A grade shipped is around $22, it lasts me several months, I hatch out between 1/4 to 1 1/2 teaspoons daily. Don't waste money on salt from the lfs, I use Mortons uniodized pickeling salt, a 4 pound box is a buck.

 

[atmmachine816]

How do you hatch your bbs, I have a black box that I pour the mix in and a clear bottle that I put over an opening at the top and so when they hatch they swim up into the bottle since they are naturally attracted to light.

 

[Tolak]

I have a box I built with a 40 watt bulb on a dimmer inside. The dimmer controls the temp. There's a small air pump on top, with a hole drilled through the top to provide air. The box will hold a couple of 1 gallon glass jars, though I usually use a cut down 2 liter bottle. I'll take a pic in a little bit & post it.

 

[Tolak]

Here's a link to some pics; http/www.fishforums.net/index.php?showtopic=136880

 

[Phoenixfish]

Here's a link to some pics; http/www.fishforums.net/index.php?showtopic=136880

nice but isnt that abit esentric?(aka going too far, i might have spelt it wrong )

 

[Dorkhedeos]

it has something to do with nutrition, i think it was 12 hours after they hatch, their nutritional value decreases

 

[Tolak]

Phoenixfish; It depends on how many small fish you have to feed. I have around 400 angels growing out right now, I'm running at around half capacity due to unloading a ton of fish at an auction in January. If I'm at full capacity, which usualy means the market is swamped, I'll be running a couple of gallon jars.

The breeder I got the idea from is running 2 of these, has 25 tanks, moves a lot of fish through brokers.

 

[atmmachine816]

Ok wow thanks, I don't think I can do that until I get older. But you are saying they lose there nutritional value after a while, so essentially the ones I'm hatching 3 days later don't really have any nutrutional value to them?

Austin

 

[Tolak]

It's not that they don't have any nutritional value, just less. This, along with the size can make a difference in very young fry.