CRS Dying, Please Help.

[reiner09]

"GH which mainly measure the content of Calcium and Magnesium ion. Conductivity measure the overall presence of electrolytes in water." by silane.

So mosura Tds up does not contain calcium and magnesium ions basically. But what is in it, I don't know.

Formulated by mosura, i doubt their formulations will harm shrimps anyway (assuming that the product do go through tests before being pushed out to the market). I do notice that mosura products do not state their ingredients,additives and chemicals used but we should understand, as it is something concerning to trade secret..

[Navanod]

"GH which mainly measure the content of Calcium and Magnesium ion. Conductivity measure the overall presence of electrolytes in water." by silane.

So mosura Tds up does not contain calcium and magnesium ions basically. But what is in it, I don't know.

It looks and smells like brown sugar to me. Hahaha! Alas, carbohydrates are not conductive as they do not dissociate in water to produce ions, so I'm probably wrong.
Electrolytes can also be sodium, potassium and chloride, not just calcium and magnesium. Sodium chloride = salt!

[reiner09]

It looks and smells like brown sugar to me. Hahaha! Alas, carbohydrates are not conductive as they do not dissociate in water to produce ions, so I'm probably wrong.
Electrolytes can also be sodium, potassium and chloride, not just calcium and magnesium. Sodium chloride = salt!

woa, we certainly do not want sodium and chloride to come together in our tanks though.. under certain conditions, cl- might become cl2 or Nacl(with Na) which is damaging to the health of shrimps..i highly doubt those ions are used though..

potassium ions is highly possible though..given by ,in weakly acidic conditions, the dihydrogen phosphate ion (H2PO

−
4

) is most common which may result in lowering the ph of the water which coincide with what is stated by mosura ... the above are just my speculations.. most probably incorrect though as i am no chemist hehheh..

[ZackZhou]

[QUOTE=leefhker;637078]woa, we certainly do not want sodium and chloride to come together in our tanks though.. under certain conditions, cl- might become cl2 or Nacl(with Na) which is damaging to the health of shrimps..i highly doubt those ions are used though..

potassium ions is highly possible though..given by ,in weakly acidic conditions, the dihydrogen phosphate ion (H2PO[LEFT]

Wah I'm an art student so I do not know specific chemical equations.
But I did use Ada brighty K/ BW essence K to raise my Tds. It's good for the plants too!
And the plus point is, I've never come across anyone reporting death of shrimp's due to overdose of potassium.
Heehee

[Ecalyte]

GH is included in the overall TDS picture. The only classification is that GH contains elements with +2 charge. Calcium and Magnesium..

[Navanod]

Sounds like I should throw in some Seachem K if I want to increase my TDS then?
I'm no chemist either, am a biologist. Zoologist to be exact...hahaha

[Ecalyte]

Actually no point increasing your TDS with a specific product/component... Because while your TDS value may be 'ideal' the contents are far from similar.. Which defeats the purpose of achieving that TDS to begin with hehe..

[Navanod]

Actually no point increasing your TDS with a specific product/component... Because while your TDS value may be 'ideal' the contents are far from similar.. Which defeats the purpose of achieving that TDS to begin with hehe..

I would assume that the "natural" increase in TDS in our tanks cane from the food we feed and to a lesser extend, photosynthesis from plants. So it's probably also rather artificial in a way.
I did some reading and my impression is that the TDS is simply a measure of conductivity and to a certain extend, a means of estimating the osmotic pressure of the water? Kinda like salinity but including not just sodium and chloride.

Osmotic pressure basically controls the movement of water and ions through the gills of fishes and shrimps and fresh an marine creatures have adapted to either retain electrolytes and excrete water (fresh water) or the reverse (marine).
In this case, the type of ions may not be as significant in the short term unless they are the toxic forms.

[mabchesq]

hi all ! Happy Chinese New Year!

i know its been a while and appreciate all of the responses .really impressed and you guys sounded just like chemist!
seriously , i'm just hoping no carcass everyday i get home after so much of patience and learning the hard way. well I have added a new batch of CRS to join in the rest in the tank after water parameters settled at GH 6 ,PH between 6.2-6.5 and TDS below 200 ppm. They were doing alright though the molting gets a little slower than i expected. These tiny angels were often seen coming out of the hiding places until today, i counted again and about 5 of them went "missing". Sad to say but this is leaving me in suspense when not even a carcass is found at all. It's starting to make me worry again.
anyone can help?

there are only the following items in my tank before it happened :
- 1 horned nerite
-1 mineral rock
-3 mineral balls
-2 small moss ball
-2 mini fissiden on rock
-1 pellia tied on mesh

and of course the updated water parameters till date since i have been working on the 10% water change by dripping method every 3-4 days for the past 1 month ++ :
GH 6
TDS 184
PH 6.6

[Neondagger]

maybe you want to take out the mineral rock or mineral ball? what your purpose of using those stuff. Can further reduce your gh to 3-4. Once you remove the rocks or ball.