Dwarf hairgrass advice?
Hi guys (and gals?),
I'm hoping to grow a nice carpet of dwarf hairgrass in my 55 gallon tank, but so far have been having terrible luck.
I purchased some Eleocharis parvula from Petsmart, one of those shrink wrapped packages where the plant is grown in clear gel. The plant itself looked extremely healthy. It was a strip about 4" long, which I broke into three smaller pieces and planted in the tank. It has been about 6 weeks now, two patches have almost completely died off, and one patch remains but isn't growing at all.
I have CO2 injection, roughly 20-30ppm. I have two T5HO lights for 110W of light (about 2W per gallon). The substrate is a mixture of gravel and flourite, with a healthy amount of fish mulm built up in it. I have a fairly big canister filter (forget the name/size). (see below about fertilizers)
I was hoping for a lower-maintenance tank, so I only have strong root feeders or easy-to-care-for plants. E.g. amazon sword, ozelot sword, various crypts, staurogyne repens. They are all doing fantastic. But the dwarf hairgrass just sits there.
I'm trying to avoid adding fertilizers to the water column. I used to use liquid ferts, but I think because I've always had these easy root feeder plants, the ferts caused algae problems, even when I followed the exact proportions recommended by Tom Barr and did water changes on schedule. And so far, all my plants seem to be doing just fine with whatever nutrients are in the soil and no liquid ferts.
In fact, I also recently started adding "Dynamite Plant Food" to the substrate (I had read other places that this is safe for tank use, doesn't contain ammonia). I've put some under everything including the dwarf hairgrass. But it still just sits there.
I suspect it's the size of the substrate. The hairgrass I can see has very short roots and it's not penetrating deeply.
Any other thoughts??
I took a little out and planted it in a pot with potting soil and lots of water, covered it with plastic wrap. It's been in a sunny window for about 1.5 weeks now and it looks bright green and looking healthy.
Thanks for any help!