Need help with conversion!

[cichlidcichlid]

ug/L of Iron at 26.7 is how many ppm.

I am trying t figure out how much iron is in the the tap water because when ever I do a water change my plants start to pearl and then stop after a couple of hours.

They like the water change water better then the ferts used in the EI method.

I want to figure out what the limiting factor is so that I can fix and get this result all the time.

[roscoe70]

I wouldn't think that iron would lead to such a short term reaction. IMH it could be excess oxygen leaving the aquarium and showing up as 'pearling', since it immediately follows a WC. There are many on this board smarter than me and maybe they can share a better idea. I'm sure the call will be made to give additional water data and your setup. Good luck.

[247Plants]

It is most likely the dissolved gasses in the tap water that are making your plants pearl right after a waterchange.

[timwag2001]

x2 on dissolved gasses. first of all you will have more oxygen with the water especially since you are creating lots of surface agitation with the change. also fresh water has a fresh supply of co2

[cichlidcichlid]

That was something I was going to ask because I am not running co2 at the moment. I am not sure it is dissolved gases because I let the water sit a get rid of all of the gas before it goes in the tank.

The water gets poured in the tank very slowly so that I don't disturb the gravel and I don't get any bubbles on the sides of the tank and the plants. I guess it is still possible!

I think it may be either co2 or the iron because the plant take off and there were no bubbles to start with.

I just want to check does any one know the conversion for ug/L to ppm?

Is 0.01-5 good for iron?

[cichlidcichlid]

timwag2001 what is the name of the plants in the pic you have?

I really like how green it is!

[timwag2001]

i doubt it has anything to do with iron. anytime that the surface of the water is broken you have gas exchange. and unless you let the water sit for 24 hours the gas definately isnt completely off gassed.

where are you getting that number from for Fe?

which pic are you talking about ?

[cichlidcichlid]

The tank with the one that has I think a puffer fish in your albums.

I found the conversion please tell me if I did this right.

For liquid solutions, ppm = mg/L

1 mg/L * 1000 = ug/L

So algebraically we have:
ppm * 1000 = ug/L

So at 26.7 it would be 0.0267 ppm.

Please let me know if this is correct it seems weird that it isn't even a ppm.

[cichlidcichlid]

bump

[timwag2001]

oh. pogo stellatus and erectum; rotala geen, rotundafolia, and indica and i think thats about it.

[timwag2001]

it looks about right to me. and that would also throw your theory on it being the fe out the window because that is a pretty low number

[cichlidcichlid]

I agree but there is still something in the water making it pearl. I assure you it is not from the water change.

I wonder if the fact I don't have co2running it is cause me problems.

I am going to check as well to see if my nitrates are bottoming out again. Even though as with the iron there is very little nitrate in the water.

Do you have a co2 system with those plants because everything is so green?

[timwag2001]

my 55 has co2 and is high tech
my 29 has no co2 and very lightly dosed with ferts

i assure you that the pearling with water changes is very common. and i'm sure that your pearling has everything to do with the water change. it happens in my 29.

[67chevelle]

The only time I see pearling is after a water change.High tech,low tech and no tech.
Well,maybe not no tech. :D

[cichlidcichlid]

Is this dosage to high for a 29 with lights on 8 hours, no co2, and 55 watt cpf?

10.8 ppm nitrate
5.4 ppm potassium
2 ppm phosphate
0.4 ppm iron

The plants are growing very slow and no algae. I am dosing the EI method and doing 50% water changes.

[cichlidcichlid]

You are right I let a glass of water from the same water source out for a couple of hours and there were bubbles all over the sides. So I guess it has more stored gas than I thought.

I was kind of hoping I was going to find something in the water. At least I got to the bottom of it though.