Low tech - add phosphate? - The Planted Tank Forum
 
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post #1 of 1 (permalink) Old 07-29-2014, 03:47 PM Thread Starter
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Low tech - add phosphate?

Low tech 45 G tank with stock (10xtetras, 2xangelfish, 1xraphael, 1xpleco (tiny), few snails and ghost shrimp). Fully cycled but new (cycle ended about 2 weeks ago).

Plants: Jungle val, anubis, crypt wendtii, amazon sword. Seachem root tabs under the sword and crypt.

The jungle val is doing both wonderfully and poorly, some growing and spreading, some just kind of existing, a bit wrinkled. The sword is also doing very well, the crypt and anubis are OK.

My question is a bit more general however -- I'm dosing with Flourish Comprehensive weekly, excel 2-3 times per week, and just got an iron test kit and see how low iron is, so am starting to do one cap of iron daily until I get back up somewhere near correct. That's also consistent with some yellowing I think.

I also got a phosphate test kit at the same time, as I was cautioned to manage it to avoid algae. It's showing almost zero, just a bare hint of color, like 0.05. My understanding is a target range is about 10% of nitrates (which are at 20ppm today, I try to manage it between 5->20 with water changes).

PH is 7.8, KH is 6.5 and GH 11 (I'm working to lower those, now using RODI water, target 7.2, 6, 5 respectively).

Should I worry about the phosphate, or just assume enough is going to appear from fish poop eventually? The last thing I want is to over-do it and get green water, right now I have a nice balance with a bit of algae and the shrimp, snails and pleco keep it under control.

On the other hand, I do want the plants to do well.

Supplement?

On a related note -- in a low tech tank with Comprehensive as described, anything else I should worry about pro-actively, or just wait to see what happens?

PS. Lit with a Satellite LED+ in about 16" of water, so PAR level probably high 20's, for 2 x 4 hours a day.
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