What are these holes in my dwc plants?

So i have four plants and only one has these holes. They are grown indoor in a dwc setup. Ph usually between 5.5 and 6.0, sometimes gets to about 6.2 or 6.3. About a couple weeks ago my ph meter hadn't arrived and when it did the ph was over 7, almost 8. Temps are between 76 to 79 F during day and nights between 65 and 68F. I've only used about 1/4 to 1/2 strength botanicare pure blend pure grow nutes with full liquid karma strength. I don't see any little bugs or nothing so what could it be? Also if you notice the leaves have four blades instead of just three or five like I normally see. Don't know if this is normal or not.

Looks like it could use a little more food N specifically. Dont worry too much about every little odd shaped leaf or set. They grow more blades as they mature 3,5,7,9

Growdict said:

Looks like it could use a little more food N specifically. Dont worry too much about every little odd shaped leaf or set. They grow more blades as they mature 3,5,7,9

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Ah ok. Yea I thought about maybe adding more but didn't want to burn them. I also noticed the stems have some purple on them on the top side but the underside seems green? Does that have to do with the N deficiency?

Adr19n said:

Ah ok. Yea I thought about maybe adding more but didn't want to burn them. I also noticed the stems have some purple on them on the top side but the underside seems green? Does that have to do with the N deficiency?

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It probably has to do with imbalance, bump up the N a bit and see how she does overall, go by overall vigor first.

Michael Huntherz said:

It probably has to do with imbalance, bump up the N a bit and see how she does overall, go by overall vigor first.

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ok I will try more nutes and see how she does. so it safe to say it doesn't look like pests??

Hard to say. You really just need to inspect plants and area. If you have bugs you should be able to find one