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Frequently Asked Questions

What is "crypt melt" and should I panic?No. Crypt melt is when leaves rapidly dissolve after a change in water parameters, lighting, or transplanting. It's usually not fatal: the roots and rhizome typically survive and regrow new leaves suited to the new conditions within a few weeks. Remove the melted leaves and leave the plant in place.
Do Cryptocoryne need CO2?No. Crypts such as Cryptocoryne wendtii grow well long-term in low-tech tanks without CO2 once established. CO2 and a nutrient-rich substrate or root tabs speed up growth, but stable water conditions matter most for avoiding melt.
Should Cryptocoryne be planted in substrate?Yes. Unlike Anubias, Cryptocoryne is a heavy root feeder and should be planted in substrate with the crown, where the leaves meet the roots, left at the surface. Root tabs placed near the roots help it grow.
Why does my Cryptocoryne look different to the photos?Crypt leaf colour and shape can vary significantly with light and water hardness, and even between plants of the same species, so some natural variation from photos is normal.