Would a liquid plant fertilizer work for Hygrophila corymbosa? I lack nutrients in my tank.?

Yes. Liquid fertilizer would work GREAT for your plants. just read the amount dosage on the side of the bottle for the correct amount to use. Maybe your plants will grow so much you can detach them and have the spread! Good Luck!

The roots along the stems is quite normal for this plant and actually indicated a healthy plant. It reproduces by cuttings and broken stems and side shoots, so the roots indicate it is ready to do this. H. corymbosa (Giant Hygro) is a very fast growing plant that will let you know if the fertilizer gets low with yellowing leaves at the growing tip. Lower leaves yellowing is fairly normal as the upper leaves block light.

Excellent aquarium plant, hardy, fast growing and pretty, who could ask for more?

With such a fast growing plant, some fertilizer wouldn't be a bad idea at all, but be very, very careful with it. Most recommends far too much be used and you will get a bad case of aglae. Use a balanced fertilizer from a good pet shop. Make sure it contains iron. Use it at about half recommended dose andsee how they do over the next month. If you get algae cut back on the fertilizer even more, if the plant yellows at the tip or stops growing, bump up the fertilizer a bit.

If you mean the kind of liquid fertilizer used for houseplants, no. This is far too concentrated. I don't like the liquid form of plants food for the aquarium because it will fertilize any algae you have as well as the plants you are trying to grow. I'd rather use the tablets, so the fertilizer is concentrated near the plants' roots. In most cases you don't really need fertilizer if you have fish in your tank. The thing most plants are lacking in an aquarium is iron (try to get a product with chelated iron - it lasts longer!).

yup its recommended you fertilize them because they grow fast and suck all the nutrients out of the water just as fast. you can make new plants out of cuttings off the old plants -- they are fast growers and easy to root. their biggest drawback is their growth habit. whack em back and keep the neighborhood in hygrophila