My 46bow has gone to sh*t lately... your thoughts?
Some background: Everything was perfect for the first six months or so, then I planted some tall grass plants (can't remember what they are), they really took over the tank and spread to hundreds of stems, during this time my Red Tiger Lotus got gigantic, flowered, then died off and shrunk to nothing, I moved a brown wendti crypt about 2 inches and it's still in the process of melting down, the other plants ( a few stems of rotala indica, and a giant hygro) are doing ok.
The problems are: black sludge on the majority of the grass plants, and thread algae. I''ve been told that the black sludge is BBA, but if it is it never gets to the fuzzy stage. I did have a few tufts of BBA on the spray bar, but it's never progressed to the tuft stage on the plants if that's what it is. I've been inching up the C02 but I think I'm at the max that the fish can take without distress, the probe is calibrated every couple of weeks. When the grass plants really spread, I doubled the dry ferts that I was dosing, I'm now up to 1/2tsp of KNO3, 1/8tsp KH2PO4, & 1/8tsp K2SO4. This seemed to help a little, but not a big difference.
A few months ago I started up another tank of almost the same size. I dose the identical ferts, and do the same amount of water change and the tank is beautiful... zero algae, vibrant green swords and aponogenton growing to the top of the tank. There is a very obvious difference between the color of the supposedly identical color temp bulbs in the two tanks. (compare specs in signture). Do you think that maybe the bulb is on its way out and it's inducing all the algae growth? The photoperiod is the same for both tanks. (10am 6700K on, noon 10,000K on, 5pm 10,000K off, 10pm 6700K off) I'm stumped.
I'm considering transferring all of the fish to the new tank and trying to correct the issues. If I move all the fish, can I just crank up the CO2 for a few weeks and cross my fingers? Should I try the Excel overdose method, or is this the same as overdoing the CO2? I'd like to clean up all of the plants so I can trade them and rescape.
Today is water change day (I've never missed one), water tests are in progress and I'll post the results shortly. I'd appreciate some input. Thanks!
46g bowfront, BML 6300K, Black fluorite, Filstar XP3, pressurized Co2, Milwaukee reg & SMS122, AM 1000
5g 36W 6700K, flourite, ZooMed 501, DIY Hagen Co2 & bubble ladder