[Golightly]

I'm having problems with Eeleocharis Parvula and a Myriophyllum Mezianum that I planted about 2 weeks ago. Older leafs are going brown and looking pretty sad. New shoots are nice and green though.

I'm thinking I might have problems with algae but there isn't any algae anywhere else in the tank but I guess that could be because I have some Oto's and Siamese Flying Foxes.

Is this due to a Algea problem, Water quality, Nutrients or just being recently planted?

Current Readings are:

PH 7-7.2
KH: 10
GH: 14-16
NO3: 25-50
No2: 0

The NO3 I don't quite understand as I've done 2x 30% water changes in the last 4 days as I'm trying to get my hardness down with RO water. The filter should be mature but maybe I've managed to kill off some of the bactaria or something.. I didn't use to have high NO3 at all.

Could anyone maybe identify what the problem might be, see images:

 

[TLE041]

I don't think the problem is nutrient-related. What lighting do you have? Do you use CO2?

In my past experience, high light and CO2 are essential for DHG.

 

[sewingalot]

I'm having problems with Eeleocharis Parvula and a Myriophyllum Mezianum that I planted about 2 weeks ago. Older leafs are going brown and looking pretty sad. New shoots are nice and green though.

Most aquatic plants are grown emersed and when you submerse them, the older grow often dies. Since the newer growth is nice and green, I wouldn't worry about it. The high nitrates could be from the older leaves rotting. I'd relax and give your plants more time to grow out. The nitrates will lower on its own with more plant growth.

 

[Golightly]

I don't think the problem is nutrient-related. What lighting do you have? Do you use CO2?

In my past experience, high light and CO2 are essential for DHG.

I have 2x T8 18w lights and yes I do use pressurized CO2, about 1 bubble per sec (drop checker nice and green).

Most aquatic plants are grown emersed and when you submerse them, the older grow often dies. Since the newer growth is nice and green, I wouldn't worry about it. The high nitrates could be from the older leaves rotting. I'd relax and give your plants more time to grow out. The nitrates will lower on its own with more plant growth.

Really? I am very impatient so that's good to hear, thanks. I've removed some plants I didn't like which meant I disturbed the substrata quite a bit, got messy and was a lot of dead stuff, old food etc that I cleaned up. Maybe that's why it's now high.