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I've got a problem in my larger tank of brittle Hygrophila polysperma stems. Every time I try and plant a new stem it will snap off at a node, but in my other tanks the poly is fine, nice and supple.

I'm trying to find out why this is happening. Chuck Gadd's site mentions boron as a deficiency, but I'm doing traces every second day so I find that hard to beleive. Also my CO2 has been upped in a vain hope of fixing this.

Any ideas people?
 

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CO2.

I've seen it in other species in the genus, as well as holes that look like many suggest is from a lack of K+, but the K+ is 30ppm all week long..........


Regards,
Tom Barr
 

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i had this prob too!...never found out what caused it tho!....every time id try replanting a cutting it would snap off!....only solution i found was to use a large tweezers or foreseps to plant the stems without them breaking.
 
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