Something else to know... when you normally inject CO2 and you have a nice HC carpet in your foreground... if your plants melt a little and the HC start to peel up in a big sheet.. it might mean that your CO2 isn't working like you think it is.
I'm not sure I want to keep the HC anyway. Now might be the time to take it in for a trade in. LOL.
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~ Kayakbabe 
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