Dwarf Sagittaria dying?

[rcalzadilla]

In my two month old tank I have about 12 Dwarf Sagittaria which have been growing normally. But this morning, there are 2 leafs in one plant that are colorless and transparent.
There are other leaves which are showing their vein structure and are a lighter green.
I have been dosing dry fertilizers for about a month and general good growth.
This week I have done 3X 50% water changes battling green algae and diatoms.

Is this happening because as water is changed the fertilizers are diluted?

Any ideas, thanks

raul

 

[ceg4048]

Hi,
This sounds like it could be CO2. Assuming you dose right after the water change there should not be a problem. You didn't really say exactly how much you dose or what size the tank is but in general if your dosing is correct then you have to look at poor CO2.

Cheers,

 

[rcalzadilla]

Thanks for reply.
125 gal/100gal net
That sounds right because I have been lowering my C02.
My fish are stressed, not eating and going to the surface and I am looking for a solution so,
I've been thinking the high C02 might be the problem. But, C02 might not the it since my records show that when first I put in the fish in this new tank (2 months old) the PH went lower than 6.4ppm and the fish were happy then.

regards,

raul

 

[ceg4048]

Large tanks are difficult using standard equipment because it's difficult to get an even CO2 distribution without gassing the fish. You may want to look at adjusting your distribution by re-working your flow pipes, adding more filtration or adding a powerhead to get better mixing. You also need to stop using your tank water pH measurements to judge CO2 concentration. It's a sure way of getting into trouble. Here is a UKAPS article with some easy explanations: Welcome to the UK Aquatic Plant Society Forum :: View topic - CO2 MEASUREMENT USING A DROP CHECKER

Cheers,