<a href=showthread.php?s=&postid=15714105#post15714105 target=_blank>Originally posted</a> by laurarca
Oh boy Rayjay....I think I goofed....the seahorses are dwindling because I think they are ingesting the shells of the brine shrimp...because as you know I was not prepared, I am using regular hatching brine shrimp eggs...I turn off the pump for about 20 minutes and I can see all the shrimp swimming around. I use a turkey baster and pull in about a cup of BBS. I think tonight for the fisrt time I saw them choking and flinching on the tank bottom :-(....I am sure it is too late for this batch...any comments?
Laura
First of all, the gyrations they are going through are most likely signs of parasites I would guess. Mine have gone through this also in the early stages sometimes. I ride it out and it seemed to work OK.
Some people treat with formalin but I never had any luck with formalin, just more deaths.
Ingestion of cysts usually just means they plug up their digestion tract and can't eat any more.
I don't know how much you hatch at a time, but in my case, I decapp the brine shrimp cysts before hatching and this eliminates the problem re ingestion. If you are not hatching many at a time, you can store the excess decapped cysts in the refrigerator for a couple of day.
Or, you can hatch out a bunch and store the hatched ones in the refrigerator for a couple of days. The frig slows up their metabolism and they don't consume the egg sack.
I decap a tablespoon at a time but you can do less if you want.
In an inverted pop bottle, I put two cups of tap water and add the cysts which float on top initially. I let it sit for 1/2 to 3/4 of an hour and then insert the rigid air line tube and aerate for another hour and a half. This hydrates the cysts.
I then add 1/2 cup of bleach (no scented bleach or with additives of any kind) and let it keep bubbling for six minutes.
IMMEDIATELY at the six minute mark, I take the container to the sink, pour the cysts into my mesh net, and rinse in cold water for not less than four minutes.
After rinsing the bottle well, I add salt water and then add the cysts and aerate for 24 hours to hatch out the decapped cysts.
After hatching, I let sit for 5 to eight minutes (not too long or they settle and suffocate) and siphon off about 3/4 of the bottle, leaving the sedement and remainder for now. I pour the siphoned off brine through the mesh net and the water goes back into the hatching bottle and again, I let it sit for 5 minutes, repeating and siphoning until I have most out but not sucking up any residue from the bottom. (About 4 cycles I do it for, less if hatching smaller quantities)
Decapped cysts have a better hatch rate, avoid the problem of lodged cysts in the digestive tract, are sterilized to prevent unknown bacteria, known to be on cysts, from contaminating our systems, and make for much easier siphoning off as there are no floating cysts on top.
There is a residue that is mixed in with the live nauplii but it's harmless to your fish and most settles out in a few minutes time before you siphon.
I'm concerned that you use a baster to suck up the nauplii. Are you just squirting it into the fry container for them to eat?
Never let hatching water contact your system water.
Pour the removed water and cysts through your mesh net and then rinse the nauplii under tap water before you use them for feeding.
I buy my cysts from Brine Shrimp Direct who keep them refrigerated for longer maintenance and better hatch rate of the cysts. In hot weather, they have shipped mine with cold packs to keep them cool.
If you don't want to decapp, then hatchable decapped cysts are available from Seahorse Source.
Don't ever buy cysts off a store shelf as you have no way to know how good they might still be after long term room temperature storage.