Posted: Mon Aug 15, 2011 1:48 am Post subject: Try or don't try breeding cardinal tetras
I will be having a 2 feet tank as spare soon hence wanted some inputs from IAH gurus. Not planning to convert this tank into a planted one or anything like that but a thought just came into my mind to try my luck at breeding cardinal tetras. Hence from the time i get the cardinals (juveniles) to the time they reach breeding condition and if ever they spawn or not etc is it worth investing the time ????
Came across this site while researching etc "http://en.microcosmaquariumexplorer.com/wiki/Breeding_the_Cardinal_Tetra". Also how do you reduce the conductivity of the water as mentioned.
Posted: Mon Aug 15, 2011 10:15 am Post subject: Re: Try or don't try breeding cardinal tetras
Wonderful that you are planning to breed the cardinals. Mumbai weather and water conditions should not be a major major issue for this. I went through the link you provided and it is quite informative. You can cross check the data with other sites - aquaticcommunity.com is a good option to compare.
Keep in mind the water condition which has to be kept very stable and ther would be verry little scope for variations. The "conductivity" mentioned is nothing but the hardness of the water (TDS). The density of dissolved solids conduct a certain amount electricity, which can be varied with reducing/increasing the amount of dissolved solids. You can hunt for a CONDUCTIVITY vs TDS (in DG or PPM) comparison chart and check out the microSemens values given in the link. You will get an idea of the hardness/softness of the water required to maintain the required conductivity.
I will also hunt for a chart and post the link/chart itself if found. Go ahead with the breeding, there are experts here who would surely help with the details
Posted: Mon Aug 15, 2011 11:11 am Post subject: Re: Try or don't try breeding cardinal tetras
@BottomDweller: I strongly believe conductivity and TDS are two different things in water parameters. This is what have come to know about both. Conductivity is a gross, indirect measurement of the concentration of ions present in a liquid solution. The unit of measure most commonly used for conductivity is the Siemen. Micro-Siemens, uS/cm, (10-6 ) is Micro-Siemens per cubic centimeter. Milli-Siemens, mS/cm, (10-3 ) is Milli-Siemens per cubic centimeter and for highly conductive solutions there is the Siemen. Conductivity is measured without regard to temperature. Compensated Conductivity is measured at 25° Celsius or some other selected reference temperature. Conductivity = 1/Resistivity. TDS or totally dissolved solids is a measurement of the total dry mass of dissolved solids in water. TDS is measured by grams per liter, g/L and is based on compensated conductivity where a temperature coefficient is selected and a TDS calculated coefficient is selected based on the types of salts in the solution. Conductivity is a measurement of Electrical Resistivity which is related to principally Sodium Chloride Equivalents and then in turn to Total Dissolved Solids through extrapolation to known measurements. Total Dissolved Solids is established by Titration and Evaporation and is a direct measurement.
Now i'm thinking as read in the link provided earlier the writer said he/she lowered the conductivity ??? how is that done.
Posted: Mon Aug 15, 2011 7:22 pm Post subject: Re: Try or don't try breeding cardinal tetras
Well Ryel, I guess you got me wrong here. Let me rephrase - the conductivity mentioned (in the link) is directly related to the lowering of TDS value to get the desired conductivity readings. Yes Conductivity and Hardness are two completely different things in water parameters - and let me put it in a simpler way here:
Electrical conductivity estimates the amount of total dissolved solids (TDS), and the total amount of dissolved ions in water. When a solution does not have a similar ionic content to natural water or salt water, then a TDS conversion factor is needed to automatically adjust the readings. This is used the world over. Ions and ionic compounds making up TDS usually include carbonate, bicarbonate, chloride, fluoride, sulfate, phosphate, nitrate, calcium, magnesium, sodium, and potassium, and any ion that is present, will contribute to the total. The TDS of a water sample can also be estimated fairly accurately from the electrical conductivity of the sample via a linear correlation equation (lets ont mention the equation here) dependent upon specific conductivity.
Also you can look up if this sounds untrue: Dissolved ions are a component of total dissolved solids, which is an indicator of water quality used the world over, again.
Hence, I would reiterate, you can reduce conductivity of the water by lowering the hardness.
And I am sure you know that all TDS pen type meters available in the market work solely on conductivity to give us the ppm reading. If the water doesnot conduct any charge, it shows "0 ppm" and more the dissolved particles and ions in water, more the reading
Last edited by BottomDweller on Mon Aug 15, 2011 7:25 pm; edited 1 time in total
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum You cannot attach files in this forum You cannot download files in this forum