Updates...the battle continues
I've made significant changes to my 125 to try to gain a leg up on the brush hair algae, both in appearance and technique. Too early to tell yet, but I'll keep you appraised of the results. Clearly, something had to be done as the algae was beginning to overrun the tank.
First, I completely removed by giant red ozelot from the tank. It had grown another flower shoot and was making pretty little white and yellow flowers, but it was dominating the tank. Despite my best pruning efforts, there was just no way to keep the leaves from shading the entire center of the tank. This is where the algae was at its worst, so it had to go. As you can see, the center is more open now, and the light gets all the way to the bottom, which hopefully will help my problem.
Before and after shot.

Secondly, I cleaned all three filters over the last 3 weeks, cleaned off the spray bars (which were coated!), and I've begun aggressively pruning the most affected leaves back. I'm not taking it all at once, nothing would be left, but I'm taking 20% at a time. Clearly a long way to go...
Updated tank scape after pruning


Next, I added some biological help. I got 6 Siamese Algae eaters to try to keep the algae in check. There's so much I'm not sure they'd ever get through it themselves, but if I can it under control, maybe they can clean up and keep it in check.
Siamese algae eater doing what they do (1 of 6 new in tank)
Finally, I've changed my fertilizer dosing philosophy. I was using PPS-Pro, but I'm afraid I am under dosing nitrates with this method and that's leading to the problem. My water parameters are as follows:
Temp 80.5, pH 6.6, ammonia 0, nitrite 0, nitrate 10, dKH 5 (89-107 ppm), dGH 10 (179 ppm), CO2 (from table) 37 ppm.
All these seem OK except possibly the low nitrates. If I'm limiting that as a nutrient, the algae may be outcompeting the plants. Therefore, I've changed (2 days ago) from PPS-Pro to E.I. dosing. Initially, the 50% water change worried me, but I was doing 25% weekly without too much trouble, so 50% shouldn't add to much.
I'm dosing 1/2 tsp KH2PO4, 1/2 tsp K2SO4, and 1 1/2 tsp KNO3 three (3) times per week (M, W, F), and Plantex CSM+B 1/2 tsp three (3) times per week (T, Thr, Sat), with the 50% water change on Sunday. I was doing MgSO4 with PPS-Pro, but given my relatively high GH, I thought I'd leave if out and see what happens. If the GH drops over time, I'll add it back in following the water change on Sunday. Hopefully the increased available nitrates, increased effective lighting due to getting rid of the ozelot, and keeping the CO2 high will win the day. Let me know your thoughts.
Regards, David
Oh, and my Congo Tetras have finally ventured out from the back left corner and started schooling around. He's an obligitory shot of them now that I can get them in the open.
Congo Tetras
