Red Temple problem

[grafalski]

I need your help guys. I`m still having problem with red temple. Older leaves are getting cracks.

Dosing 2 x /week :
1/4 Tsp of Potassium Nitrate
1/16 Tsp of Mono Potassium Phosphate (KH2PO4)
1/8 Tsp of Potassium Sulfate

1/4 tspn of magnesium sulfate once a week by water change ,
6ml TMG 3 x /week
29 galoon, 65 W for 12 hours/day+another 65W kicking in for 3 hours in the evening, CO2 mist method.
Flourite
PH 6.6, KH 5, GH 7
Water change 50% once a week (3/4 RO)

I`ll try to upload picture so you can take a look at this.

 

[czcz]

I think the cracks are pinholes spreading, and you should increase Potassium. If thats green spot on the top of the leaf, most agree its a Phosphate deficiency.

I would suggest simply dosing your macros a third day. Move problem plants into the flow of CO2 mist and you'll jump start repairing them.

Welcome to AA!

 

[malkore]

i agree your potassium dosing seems a little low.

also, 'red temple' alternathera renekii loves good iron levels. perhaps your TMG trace doesn't have enough iron.

i'd try more potassium first, then a little extra iron secondary if the K doesn't fix it.