The algae have discovered my tank and the otos and amanos are feasting! Suspect causes are too much light (probably around 80-90umol) from the T5HO plus some afternoon direct sun, a huge increase in bioload and inattention to fertz.
The new fish are the big bioload increase and caused a recurrence of cycling problems. I’ve finally got the ammonia and nitrites back to zero and hope to keep them there. While fighting the nitrites I let the phosphates, potassium and micros get too low while doing lots of water changes and I’m sure that also contributed to the algae outbreak.
I’ve now got back on track on the fertz and even with only one T5NO and one actinic the plants are looking much better. I plan to get a lot of fast growers at the auction this weekend and hopefully turn the corner on the algae in a couple of weeks.
I ordered some 6700K T5NO bulbs from Big Als Online and they arrived today. They look great and should give me better control with options of 40 and 60umols plus whatever the NO actinic contributes. I’ve also received a timer and remote to build into the fixture which will give me control over three items and also reduce the number of cords from the light to just one for better appearance.
Finally, I added some flow directors to the locline outputs to try to generate more surface ripple and spread the flow a bit as well. I’m hoping the ripple will breakup the surface biofilm that keeps forming.