What's on my plants? - The Planted Tank Forum
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post #1 of 16 (permalink) Old 09-14-2015, 02:32 PM Thread Starter
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What's on my plants?

Hey everyone
I have a 75 gallon planted tank and I've noticed hard black spots on the leaves of my plants.
I run my fugeray lights 8 hrs a day.
For filtration I have 1 flu value 406 1 flu value 206 and one hob aq 110
I clean each filter every third month.
I do weekly wc of 25 gallons with aged water. I use prime.
Plants are most anibus vals and 3 amazon swords.
I dose one cap of excel weekly plus once a week I dose with profito.
I have
3 angelfish
9 Cory
About 12 tetra.
Shod I be dosing more excel? How much how often?
I don't use co2
Thanks
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post #2 of 16 (permalink) Old 09-14-2015, 03:33 PM
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Looks like BBA growing on your anubias... That plant grows slowly and belongs in the shade...

It's hard to tell with all the algae, but looks like the anubias might also be showing some signs of nitrate deficiency (withering leaf tips in the old growth).

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post #3 of 16 (permalink) Old 09-14-2015, 03:52 PM
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Excel should be everyday. It only lasts 24hrs. Pictures are hard to tell but your tank looks pretty bright for a no co2 tank.
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post #4 of 16 (permalink) Old 09-14-2015, 03:55 PM Thread Starter
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Thanks Mattinmd
I actually have flourish nitrogen. I haven't been dosing with it so I'll start now
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post #5 of 16 (permalink) Old 09-14-2015, 04:07 PM
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Nitrogen may help, but too much light is almost certainly your biggest issue... BBA usually indicates too much light for the amount of CO2 present, and generally targets slow growing plants first.

daily dosing of excel, per jrill may help, as it suppresses algae and offers a tiny bit more carbon to the plants.

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post #6 of 16 (permalink) Old 09-14-2015, 04:15 PM Thread Starter
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Thanks jrill and Mattinmd
I have no problem dosing excel every day. My concern is my vals and my fish. I'm not too worried about the vals I can replace them but I am concerned about the excel killing my fish.
I can try to figure some way to raise my lights
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post #7 of 16 (permalink) Old 09-14-2015, 05:24 PM
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Your fish will be fine.
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post #8 of 16 (permalink) Old 09-14-2015, 05:26 PM
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Quote:
Originally Posted by partobe View Post
Thanks jrill and Mattinmd
I have no problem dosing excel every day. My concern is my vals and my fish. I'm not too worried about the vals I can replace them but I am concerned about the excel killing my fish.
I can try to figure some way to raise my lights
I dose daily at 1.5x label rates, many dose at 2x label rates...

Also, most folks here suggest ignoring the 5-times normal initial dose on the label..

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post #9 of 16 (permalink) Old 09-14-2015, 05:29 PM Thread Starter
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Thanks jrill and Mattinmd
I've temporally figured a way to rase the lights.
I dosed the amount for a 55 gallon and will do that daily. I don't want a massive val die off.
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post #10 of 16 (permalink) Old 09-14-2015, 05:36 PM
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Ok, just make sure to read the label.. the first dose on the label is 5-times normal, and is intended to be dosed one-time after water changes (per seachem's plan)..

You should be dosing 5.5ml, not 27.5ml, if you're going with label rates.

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post #11 of 16 (permalink) Old 09-14-2015, 06:07 PM Thread Starter
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Thanks if skipped the first dose and just did one cap
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post #12 of 16 (permalink) Old 09-14-2015, 06:20 PM
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Why is first dose 5 times normal important?
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post #13 of 16 (permalink) Old 09-14-2015, 06:40 PM
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I am not convinced that it is BBA. The color suggest diatoms to me but photo's can
deceive on color so not saying that I know it's not BBA.
A closer picture of just one of the plants might help/w this. But if it is or not, I'd suggest you split your photo period.
You light is not really as high as Amazon Swords like and I'll bet they grow rather
slowly. But then that could be an advantage to you so...
I would suggest that you look at the factory directions on dosing the Excel and cut it in half for the first week. Vals are sensitive to it, but if gradually acclimated to it they usually adapt. I'd also ignore the directions about using more after a water change and at the start up of using it. Just do half of the recommended daily doses for the first week and then increase to full doses. I use slightly more than 2x the recommended amount(don't have vals) and have no ill effect on fish.
I work nights but my photo period is split as if I worked days because I get home just after people have already left for work. So it fits fairly well anyway.
I'd do 3 hrs or just slightly more somewhere in the A.M. then a dark/no light period of
not less than 4 hrs and then a 4 hr light period again. Total of 7-7.5 hrs.
Algae doesn't "store" energy but plant do so it gives the plants an advantage when
you split the photo period like that.
I don't know the exact distance between your fixture and the sub. But this chart tells me
that you have between 38-43 PAR as a guestimate.
https://www.plantedtank.net/forums/sh...d.php?t=189944
FugeRay 48" chart.
But that is not very high. Just getting into the med range. I have 45-50 PAR/w those same hrs I listed as the split period and my Anubias don't have that/any algae on them.
I use one dose of EI ferts per week and the 2x doses of Excel each day.

The shortest distance between any two points is a straight line...in the opposite direction...
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post #14 of 16 (permalink) Old 09-14-2015, 07:21 PM Thread Starter
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Thanks Raymond
I also run 4 hrs then 2 hours off then back on for 4. I'll follow your instructions on excel.
Thanks
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post #15 of 16 (permalink) Old 09-14-2015, 07:57 PM
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If you can raise the light by 3-4" then that should be enough. Otherwise I'd do 4 hrs on the no light period.
I haven't had to fight BBA yet so I don't know how Excel will effect it. But daily use
will have much more effect than once a week if it's going to. But don't expect it to disappear over night either. I had a bad case of GSA on the leaves of an Anubias nana Pettite and it took a couple of months for it to go away after I reduced the light.
But on the bright side time and again I've read on here that it just won't go away after
you correct the problem and that you will loose those leaves effected by it.
Well mine went away, but after a couple of months patience.
Mostly saying you need to give it time to work before you conclude it didn't and move on to some other remedy.

The shortest distance between any two points is a straight line...in the opposite direction...
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