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post #1 of 5 (permalink) Old 10-21-2014, 04:36 AM Thread Starter
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Newbie question

Hello all... new to the forum, first post

I've had my 90 gal set up for 6 months or so, and added co2 and EI dosing over the last month... and experienced my first bba bloom.

Other than adding some Amano Shrimp and removing the worst of the bba covered leaves, all I have done is try and tweak my balance issues. Upped co2 to get 30 ppm, EI dosing w/ 50% water change on Sundays, (2) 54w HO 26" above substrate (glass covers on tank because of small children). Seeing tons of new growth, which is great... and the bba had begun to recede some.

Should I maintain the routine and light position, or would you suggest any adjustments? I am assuming that the inital bba bloom was due to the co2 imbalance, though I now want to make sure that the light amount isn't too low for the fert amounts...
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post #2 of 5 (permalink) Old 10-21-2014, 10:33 AM
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I've read about tanks/w as many as 6 T5 bulbs/w injected CO2 on 90g tanks because of the heigth.
You didn't mention photo period. A good percent of faster growing plants helps this issue as much or more than other things you might do but increasing the photo period in one hr incriments till you find a good level brings the light up almost the same as adding more bulbs does.
I don't necessarilly have the patience to practice what I'm about to preach but I suggest leaving the raised level of hrs at least a month before deciding it does or doesn't work enough. Preferrably 60 days.

The shortest distance between any two points is a straight line...in the opposite direction...
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post #3 of 5 (permalink) Old 10-21-2014, 10:45 AM Thread Starter
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Thank you for the response. Photo-period is is 8hrs.

I have a 6 bulb fixture (without a name), which has groups of 3 bulbs & 2 timers. Should I extend both the period for both bulbs, or just one?

Does the glass cover have a significant impact?

I have a healthy amount of Ludwigia Narrow leaf and Rotala Rotu that I'll stop pruning as well...

Last edited by Bishop61; 10-21-2014 at 11:05 AM. Reason: spelling
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post #4 of 5 (permalink) Old 10-22-2014, 10:44 AM
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BBA is said to be connected to fluctuating CO2 levels. Perhaps getting it dialed in counts as that.
The glass counts so just keep it as clean as possible. Fairly insignificant if clean.
You said the BBA was getting less. As the plants get growing better they will fight it. I always think I need to do something about it.
But sometimes just letting it do it's thing for a while does just as good. If you look on the BML site at the "Dutch" tank that they have when trying to promote the Dutch style light is how tanks/w 6 bulbs
needs to have plants for that much light.
I wasn't sucessful/w high light. I have heard it said on here that working your way up to higher levels of light is easier than starting off/w it.
And I just read a thread or a post in a thread which said that in a 75g tank the four bulbs/w injected CO2 didn't produce much faster growing plants than two bulbs had so they lowered it to three bulbs.
You have a few more inches taller tank so their four bulb is likely equal to your 6 bulbs. Sounds good till you find out that they had T8 bulbs.
So something you said is confusing me. In your first statement you said two bulbs @ 54W each. Then you said should you extend the photo period in both bulbs. But the fixture is for 6 bulbs.
So you are only using two bulbs in this fixture ?
If that is the case a 90g tank may handle more bulbs(1 more).
But I'd give it a while to see how the plants grow because one month
is just past the point at which it should have been noticable that you started the EI and CO2. Once they get growing well it might be that they show a deficiency. EI is a saturation level but with certain plants known for using certain nutrients more than normal it can happen in there. I wouldn't add more light time till your at 60 days.
See how the BBA does between now and then. Let the tank get settled in.
I don't think I would stop pruning either unless you need the cuttings for more plants in there.
After you pass five post you can enter pictures also. This does help.
Just for the info, you might put a simple question in the lighting section: How many T5 bulbs in a 90g tank/w injected CO2 ?
Since I have no exp/w that size tank(and the reason I had no success/w the high lights is that I didn't have CO2 but only Excel)it would be to your advantage to get some feedback from someone who had/has that size tank/w injected CO2 in it.

The shortest distance between any two points is a straight line...in the opposite direction...
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post #5 of 5 (permalink) Old 10-22-2014, 11:37 AM Thread Starter
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Sound like good advice... thank you
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