you need a soil with high fert content, like ada amazonia, high light and co2 levels. If your HC is emersed, bubbling is normal at the beginning, but does not mean its doing well. Give it at least 2 weeks, you will know if it will succeed in your tank. Use drop checker to adjust the co2 levels. If requirements not met, they simply melt and its unsightly and hard to clear. Good luck.
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