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post #1 of 4 (permalink) Old 03-07-2009, 04:04 PM Thread Starter
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Dosing question

I have an acrylic 5 gallon bowfront from several years ago (when I thought it would be great for Mollies ) that I have cobbled together in the last couple months as a mini planted tank. There's about 2 inches of flourite as the substrate. A Rapids power filter HOB is the filtration. One male Betta as the lone fauna. Flora includes anubias nana "narrow leaf", anubias nana "petite", java fern trident, java fern lace, and a marimo ball. Water temp is a constant 74 degrees. Water changes are 1/3 weekly.

I've been dosing the bottle recomendations for Seachem Flourish twice weekly and recomended dose of Flourish Excel every other day. For the first month I had a 15 W incandescent bulb over the tank. I had no algae issues, but no plant growth to speak of. I swapped it out for a 25 W incandescent 2 weeks ago and and started seeing new growth on all the plants, but am starting to see a pickup of algae as well. I definately have diatoms and what is probably hair algae.

In the last several days I have noticed my plants aren't looking as healthy. Do I need to be dosing something else to keep them looking healthy? Should I switch back to the 15 W bulb? How much is safe to overdose the Excel to help stem my rising algae problem?
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post #2 of 4 (permalink) Old 03-07-2009, 04:18 PM
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With the 25w you may want to look into adding some potassium along
with the Flourish Comprehensive, and Excel, maybe look into adding
some C02/DIY would work on a tank that small, and/or raise the 25w light
above the tank some, or revert back to the 15w.

Your plants are low light/slow/er growing plants, adding more light
without C02 and other needed nutrients is counter productive.

Craig

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post #3 of 4 (permalink) Old 03-08-2009, 02:18 PM Thread Starter
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I guess my main question is this: since I have slower growing plants, do I need to be dosing anything besides Flourish comprehensive and excel with the 15 W bulb? I have Seachem N, P, K, trace, and Iron, but wanted to see how things went and gauge what I actually needed. The Betta gets fed a small amount everyday, but I can't imagine he's having a terribly large impact.
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post #4 of 4 (permalink) Old 03-08-2009, 02:56 PM
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It just really depends, with a tank that small and slow growing plants
you just have to see how things go with the amount of light being used.
Light is the main factor, that determines what is needed.

Adding a little K, and Comprehensive a couple times a month may suffice
while allowing the betta and it's food to supply the other nutrients in
small amounts is usually good enough.

A 15w fixture seems like it would be a bit on the high side but once again
it depends entirely on the lighting/bulb/reflector/intensity.

If it is on the high/er side of light, then adding a touch of all nutrients ie
N,P,K, Comprehensive, Excel once a week will improve things.

Without actually seeing your setup and the plants in response to there
current situation, you just have to get a feel for what is needed.

If you do dose all nutrients, without the addition of C02, it will not take
much of each nutrient, so only small amounts.

Craig

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