Cal deficiency but feeding cal/mag ? Leaf pics

I hope you haven't gotten the dreadful fusarium foot rot. It develops from inside of the stem and outwards. Happens often to people using rockwool in DWC. The base of the stem never dries out.
 
I top off with nutrient solution the same strength as is in the res rather than plain water unless my ec rises (which it seldom does)

Could this be the problem?
 
Wastei said:
I hope you haven't gotten the dreadful fusarium foot rot. It develops from inside of the stem and outwards. Happens often to people using rockwool in DWC. The base of the stem never dries out.
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i've never done a RW grow but doesn't that happen more when using the big blocks versus the croutons??
 
fartoblue said:
I top off with nutrient solution the same strength as is in the res rather than plain water unless my ec rises (which it seldom does)

Could this be the problem?
Click to expand...
it shouldn't although your nutrient ratios could get off doing this. i usually top off with water and do a weekly res change to avoid that problem. but alot of people go a whole grow without changing res.
 
rkymtnman said:
i've never done a RW grow but doesn't that happen more when using the big blocks versus the croutons??
Click to expand...

Yes that is correct. People keep insisting on using rockwool cubes in DWC. For me it's like asking for a problem to happen. Low DO will cause so much problem and is the most prominent issue in Hydroponics I think.
 
Wastei said:
Yes that is correct. People keep insisting on using rockwool cubes in DWC. For me it's like asking for a problem to happen. Low DO will cause so much problem and is the most prominent issue in Hydroponics I think.
Click to expand...
I use the croutons Wastei there is plenty air in them. The more I think about this situation I think my EC may be to high @1.2 - 1.3 and causing lockout and sporadic PH drop. Although my PH has never been below 5.5 it has never been higher than 6.0 for any length of time. I am going to try it at 6.2 - 6.4 adjusting a few times a day if necessary hopefully this will correct the CA deficiency.

Humidity is slightly on the low side.
 
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