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What's wrong with these crypts?

A

Andrew Lindsay

Member
Joined
11 Sep 2018
Messages
55
Location
East Midlands
These crypts have been in a while and just won't seem to thrive unlike the java fern and water sprite. New leaves do appear but don't last long. I do use liquid fert. and CO2. Thanks.
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Any help much appreciated.
 

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Water hardness, PH?
 
I’m guessing this is a magnesium issue. Crypts seem to need more magnesium than most. Remove all the damaged leaves as they’re no use to the plant and try upping your magnesium dose. This is easy enough to obtain as Epsom salts.

What fertiliser are you currently dosing and at what level?

cheers

conor
 
Thanks to both. The ph hovers around 6.7/8 according to my hand held electronic stick (not sure how good it is) Also, the drop checker does turn green. No idea about hardness as I've no means of measuring it.

I dose CO2 supermarket 'All in one' fert. daily at the recommended rate of 5ml/40 ltrs., which they state each 5ml dose adds:
1.5 ppm Nitrate
0.4 ppm Phosphate
1.6 ppm Potassium
0.2 ppm Magnesium

I also do 10% water change each week.
 
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