yamato clear out.

[guan]

hi dear all, 2 week before, i brought 6 yamatos frm Y935, they are about 1 inch big in length.
they are doing well, after one week, i added 9 grade B crs. last 3 days, i found that the yamato are shelling. few hours later, one dead yamato is found, the shell is gone, left the pathetic shrimp flesh exposed. today, i found 2 more dead bodies of the yamato, too without shell n and head.

what's happening here? anybody knows about the situation?

[michael lai]

Hi Guan, did you just change water when the events start happening? Or did a major rescape?

[guan]

nope, everyting was nt not changed, the tank was set up in late feburary. the plants and cardinals, rumby nose are doing alright til till the yamatos are being added. only top up 1 liter of water every two day. the yamato simply just dies off. without shell after death. just like the prawn meat we use for wraping dumpling.

[richietay]

guan, how about disclosing more information, ie: tank spec....

[guan]

okie. it is a 1.5 *1*12inch 6mm tank.
filter: super canister,AC230v,50hz,10w
lighting: dymax 2*21w(3ft)
cooling: profantec,230v cooling fan
co2:1 buble per second.
substrate; ADA substrate, with base fertiliser.
10 cardinals, 9 rummby nose, 1 oto, 9 grade B crs, 2 yamato(initial 6),

plants- mini nana, dwarf java fern(narrow leave),tiger lotus 'red', japan hair grass, spiky moss on driftwood, and 2 other plant from colorful(name unknown).


lighting hour: 10 hr per day.
co2 supply: same as lighting hour.
ph: 6.5-6.8
water temperature: 25.5-26.7


this was set up in late feburary.
no algae infection from start, water condition stable, only added water once 2 day when evaporates, and added liquid fertilise, dr malik once 20 days.
just tired dennerle s7 7 days before.

so far all plants and fishes are growing well excepts the dead yamato.

PS; used 3 ft lighting, but this light is 8 inch away from the top of the tank.

this is the most i can provide, the rest of the KH information n and etc i dont have to equipment to test

[luenny]

What about your CRS? Are they ok? I am no expert in this but dead shrimps without shells may mean Calcium deficiency.

[grey_fox]

I think temperature plays a part as well, I had a mass 'exodus' of yamatos when my tank's temperature rose till about 29 degrees at one point... however if you CRS are doing fine then I seriously can't explain.

[guan]

the situation is worse today, temperature maintained at 26 degree.
but today i found one more dead yammato, and 5 dead CRS. heavy loss this round. strangely this time round, the shell are floating around the tank.

thus anyone noes whats the situation now?

[grey_fox]

After the moulting they die? Including the CRS as well guan?

[mordrake]

it is a 1.5 *1*12inch 6mm tank

your tank size as above?
if so, your bioload abit on the high side. check your ammonia & nitrite
what about KH?
looks like once they molt, they're gone....

[guan]

to fox,
first yamato tat moulted died, but the rest, i didnt have the chance to see how they died, but they died naked.
just like the CRS i found today at 4pm.

to mordrake,

18inch*12inch*12inch.
this is the tanks size. nitrate level and other information i couldnt get it due to equipment lacking.if it is high nitrate? what will be the sympton?
and, if there is high nitrate n and ammonia, will there be smell from the water? because the water seems to be odourless too.

[richietay]

guan, have you added any new plants? had one incident, where i introduced newly bought plants without having it washed. my whole batch of yamatoes and cherry shrimps all died because of the pesticides from the plants.

my friend happens to face a similiar problem like yours, his yamatoes died one after another. Strange thing is the batch of cherry shrimps which i passed to him doing fine. the batch of yamatoes bought are unhealthy??
still wondering where is the root of the cause?

[luenny]

I am no expert in this but I think if it is nitrate & ammonia, your CRS will be the first to go - i.e. your CRS probably will go within the first few days. And if that's the case, usually, they just die normally, not die naked without shells. At least that's my personal opinion.

[guan]

talking of new plants, i brought 3 plants from colourful, but i rush them under the running tap before planting them.but, that was 3 days after yamato are in, but til till now, it is about 5 days after the plant are implemented. thus i dont think it is the plant problem.

as for luenny, i agree with you, but the crs came few one week later, but they died 3 dys after the first yamato is found dead. thus, i think the root of the problem is not known yet.

[Justikanz]

Shrimps moult when they are:

1) in new environment,
2) in shock,
3) in unstable environment, and
4) they are growing.

Generally, besides the last reason, it just means they are not happy.

If the new plants were from Colourful, they should be safe... But I would like to know if the set up is new and whether the substrate is new. Oh, what substrate is used, btw? And had you been medicating or adding salt to the tank?

Oh, btw, please do not use sms lingo. Spell properly. Thanks.

[guan]

thanks justikanz. sorry for the sms lingo, was in a rush, thus always type too fast.

regarding the the set up, it is ald already 3 months old going to 4 months. the substrate and base fertiliser, together with the tank were second hand when brought, from AQ forum one of the member. he had used it for less than one month before i brought from him. it was ADA substrate, but the name of the substrate i wasnt sure. no medication at all, besides the liquid fertiliser- LUSH Gro-AQUA from NA.i apply at 5 drops every 20 days. the most recent one week, i started to use dennerle S7, at 1.5 ml according to ratio of my tank.

i had never add salt to my tank from start to now.

thats all i think i can remember. but according to some friends they told me that the bio load is too high, thus they advise me to do a 20% water change.

i had not taken action until more advise had been given. thanks

[Goondoo]

Oh, btw<-- Isn't this SMS lingo too? , please do not use sms lingo. Spell properly. Thanks.

Was told by the Forum software to post something.....

By the way, guan, your tank likely overload. I told you to control your desire to add fishes right?

Edit: Thanks, Billy. I added that in the abbreviation/common terms used in AQ. Please refer to http://www.aquaticquotient.com/forum...ad.php?t=19268.

[guan]

hi kemp, hi billy, long time no see billy,
oh, my tank already overloaded?
so looks like i have to give away the rumby nose.
i did a water change of 20%, and now, no more shrimps found dead.
but, only 2 CRS is left. they are always hiding behind the driftwood, or inside the spiky moss.

but i was told by one of the customer at Y935 that CRS requires a constant temperature of 25degree to survive? is there such a fact?

[Goondoo]

hi kemp, hi billy, long time no see billy,
oh, my tank already overloaded?
so looks like i have to give away the rumby nose.
i did a water change of 20%, and now, no more shrimps found dead.
but, only 2 CRS is left. they are always hiding behind the driftwood, or inside the spiky moss.

but i was told by one of the customer at Y935 that CRS requires a constant temperature of 25degree to survive? is there such a fact?

dunno Don't know, CRS always last on my list....

[wks]

CRS can tolerate up to 28C. Since we are experiencing a hot spell now, its best to get a fan. You can get one for only $20 from Yishun Blk618 lfs.