In article ,
Ozdude wrote:
I'm finding this out with my spiralis actually. I'm getting substrate
fertilizer balls next week and the Val. patch is getting one (hopefully I
can insert it without disturbing their roots too much).

I believe it thrives if potassium is prevalent.

No, it thrives is potassium is not the limiting factor. But it
also needs nitrates, phosphates, Iron, and trace elements.

The Val. in my tank has picked up quite significantly since I started daily
liquid fertilization about a week ago, but my male Honey Gourami has a
really stupid habit of swimming straight into the fertilizer when I add it
to the tank (he's too friendly) and I'm getting really worried that sooner
or later he's going to suffer micro-nutrient poisoning.

No, he'll be ok.

The liquid stuff I'm using states on the label that there is no phosphate or
nitrate in the mixture but I'm now getting green algae on the rocks, and
it's funny that it's only appeared since the diatoms went and the liquid
fertilizer started. Time to look at getting some Seachem Flourish me thinks
I'll leave it for now though, because it actually looks okay and the
SAE's like to have a chomp on it.

The green algae is forming because you don't have enough nitrates.

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