03-29-2018, 01:51 PM
Join Date: Apr 2005
Location: Brentwood, CA, USA
iTrader Positive Rating: 100%
| | Re: Holes in older leaves. EI Dosing
The needs of the plants depends on how much light you have, as well as what plants you have. Let's look at light first: What light fixture, what brand, a link to the specific light, etc. do you have? And, what size tank, what dimensions, do you have? With that we have a chance to guess how much PAR you are getting from the light, and from that we can guess if you have high light, where all of the nutrients and CO2 are critical, or low light, where you can get by with a lot of shortages, or something in the middle.
Just looking at plants isn't a good way to figure out what might be missing.