I need some advice on Fertilizing my tank

[u2_Crazy]

I have a moderatly planted 29ga tank. Currently plants include Ambulia, Anubias Nana, Java Fern and a "bunch Plant" not sure the name pics are here though, it's the plant on the right sode of the tank: http://www.aquariumadvice.com/photopost/showgallery.php?cat=500&ppuser=11905

I have 6 tiger Barbs, 4 Rosy Barbs, 3 Cory Cats and 2 Clown Plecos, 2 Apple Snails as inhabitants.

I am injecting C02 by a DIY 2 bottle yeast sugar mix into a jungle labs chamber placed under the filter output which is working well as far as I can tell.

The only ferts I add is the SeaChem Flourish 2x a week (1 cap).

I have holes in the leaves and the growth is good, but I know it could be much better.

So, can someone please give me some ideas on what else to do and if you could please get into detail.

Thanks

 

[malkore]

need to know your lighting levels first.

need to know nitrate and phosphate levels too...and your dKh and pH levels so we can determine your CO2 level.

 

[u2_Crazy]

Nitrates are usually around 20ppm
PH (I am having trouble reading the test, It can be 7.2 - 7.8)
Phosphates (I don't have a test for it)
Hardness is 120

Lights are 55W PC.

 

[malkore]

is that 120ppm of General hardness, or alkalinity? assuming its alkalinity, that puts your CO2 levels just under 20ppm. not too bad, and you don't have a ton of light so 'perfect' CO2 levels aren't as important.

My guess is potassium deficiency. Flourish is really more like a weak comprehensive trace fert, and won't cover macro needs unless its a low light tank that hardly even needs fertilizing.