EI - is this dosing schedule right?
For ~6 months my 28 gal plant tank has been an algae heaven, so I decided to: 1) switch from DIY co2 to tank/injection and 2) start dosing w/ Tom's EI method. After 10 days EI dosing (if I'm doing it right, see question 1) and 20 days co2 injection the algae has gone from an eye-sore to absolutely prolific. My plants have also gone from barely surviving to thriving, but covered in BBA (tons of this), fuzz (huge amounts), green spot algae, and some sort of long thread algae.
4.6 watts/gal pc 6500k, 10hrs/day
~18 fish, cardinal tetras and others similar size
6.9-7.0 pH (Lamotte)
170ppm KH (Lamotte)
32.0 ppm CO2, injected, left on 24/7
old Emperor bio-wheel power filter
I'd sure appreciate any help in identifying the source of my algae problems! Here are specific questions, though general advice is also appreciated:
1) Is this dosage right for EI:? All quantities listed below are total for weekly dosing. All products are Seachem. I plan to switch to dry ferts eventually, but this is what I have now and would like to make it work. I do trace and macros on different days, Excel every day.
50% water change 1/week (w/ tap water, hard ~180ppm GH, other parameters unknown)
2.5 mL Flourish
15 mL Trace
7.5 mL Iron
35 mL Potassium
25 mL Phosphorus
10 mL Nitrate (I assume that this should remain low because of high fish load)
20 mL Excel (I've upped this a bit the last few days in the battle against the algae)
2) Could the fish load be the problem?
3) Do I need a filter that disturbs the water surface less than the hang-on-the-back power filter? The tank isn't covered
4) Could there already be too much of any of the things I'm dosing in the tap water, such that I've got way too much after dosing, and feed the algae? i.e. nitrate or phosphate
Thanks so much for taking the time to read this and offer advice! I'm at my wit's end!