Specs:
26g Bowfront
65w PC Light (8.5 Hrs/day)
DIY C02 (2 2L bottles) new bottle every 5-7 days. D.C. stays green using 5dkh solution. As soon as I get my Rex-ulator order I will be going pressurized (next week)

When I started dosing my 26g about 8 months ago, I was using this as a starting point:

_Dosing Regime's_ - The Planted Tank Forum

20~40gal
50%H20 change-weekly
+/-1/4Tsp-KN03 3x a week
+/-1/16Tsp-KH2P04 3x aweek
+/-1/16Tsp-K2S04 3x a week
+/-5ml or 1/16Tsp-Trace 3x a week
+/-1-2ml-Fe/Iron 3x a week

I know the EI thread here in this Forum, the extra K2S04 is not included in the dosing recommendations.

I understand that the KN03 and KH2P04 pretty much cover the pottasium requirement. Should I go ahead and stop dosing the K2S04?

I currently dose the following on this tank:

1/4Tsp-KN03 3x a week
1/16Tsp-KH2P04 3x aweek
1/16Tsp-K2S04 3x a week
1/16Tsp-Trace 3x a week
2ml-Fe/Iron 3x a week (Flourish Iron)
Excel 2ml daily

Growth is excellant, however the last month I have started seeing a small amount of BBA. Not sure what is causing this. My D.C. never changes from green even with the 5dkh solution.