hi!!
As you migh have read somewhere, I bought an oxyguard co2 analyser that measures directly! CO2. After some testing I knew that it did NOT matter where in the tank I measured, the reading was the same, even after one hour measurement. more surprising, the co2 level was 65 mg/l!! that's why my shrimps were dying. In any case, I certainly do not have a lack of co2 and a very decent current that is able to get everywhere in the tank the same co2 level.
However, the plants are not doing great. just the usual stuff: a bit stunting, small leaves, algae growing faster on leaves than you want... all the things that Tom associates with poor CO2 levels. My data suggests that it is not that simple.
So if it is not CO2, what than?
PO4 is always above 1
NO3 is between 15-25
Ca is 25 mg/l
Mg is 6 mg/l.
KH: 2.5
TMG is dosed every day, 10 ml in 90 gallon
on top of that: 5 ml florish iron, just to be sure.
water changes 2x per week 50% per waterexchange. I use pure RO water with sera mineral salt till a concuctivity of 300 uS.
Basically, one parameter is left....: light.
I have 5x 80 watt dimmable T5 with reflectors, which is 400 watt per 90 gallon. The PAR meter is ordered, but not in yet. My hypothesis is that the light intensity causes such a fast metabolism, that deficiencies are induced, despite that all the parameters are oke.
It would be very fun though if I do not have high PAR readings.... what would than be the cause of the suboptimal plant growth???? Personally I have no idea.
In any case: the conclusion from this post is that CO2 is not always the direct single cause of problems that one experiences in our tanks.
greets,
yme
As you migh have read somewhere, I bought an oxyguard co2 analyser that measures directly! CO2. After some testing I knew that it did NOT matter where in the tank I measured, the reading was the same, even after one hour measurement. more surprising, the co2 level was 65 mg/l!! that's why my shrimps were dying. In any case, I certainly do not have a lack of co2 and a very decent current that is able to get everywhere in the tank the same co2 level.
However, the plants are not doing great. just the usual stuff: a bit stunting, small leaves, algae growing faster on leaves than you want... all the things that Tom associates with poor CO2 levels. My data suggests that it is not that simple.
So if it is not CO2, what than?
PO4 is always above 1
NO3 is between 15-25
Ca is 25 mg/l
Mg is 6 mg/l.
KH: 2.5
TMG is dosed every day, 10 ml in 90 gallon
on top of that: 5 ml florish iron, just to be sure.
water changes 2x per week 50% per waterexchange. I use pure RO water with sera mineral salt till a concuctivity of 300 uS.
Basically, one parameter is left....: light.
I have 5x 80 watt dimmable T5 with reflectors, which is 400 watt per 90 gallon. The PAR meter is ordered, but not in yet. My hypothesis is that the light intensity causes such a fast metabolism, that deficiencies are induced, despite that all the parameters are oke.
It would be very fun though if I do not have high PAR readings.... what would than be the cause of the suboptimal plant growth???? Personally I have no idea.
In any case: the conclusion from this post is that CO2 is not always the direct single cause of problems that one experiences in our tanks.
greets,
yme