DWC Week 5 veg need some help

Up until now I've had no problems but now the plants growth has slowed and it's begun to get pretty droopy. At first I thought it may have been signs of root problems but the roots seem fine rn. I was thinking it may also not be getting enough oxygen but I'm not sure as this is my first Dwc grow. I have two 4 inch air stones so I'm thinking that should be enough but like I said I'm not sure.

I was gonna top it this week and start mainlining but figured I'd try to get some extra opinions on whether I've got a problem or not and try to fix anything I can before topping.

Any bit of help is greatly appreciated as I am brand new to hydro, and not a very experienced grower in general.

How tall is your plant, because from the pictures it looks a little small for 5 weeks?
Also it could be the water temps being to high causing a slowed growth rate.
Hope this helps.

JAMO_Grow said:

How tall is your plant, because from the pictures it looks a little small for 5 weeks?
Also it could be the water temps being to high causing a slowed growth rate.
Hope this helps.

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Week 5 just started Sunday and it's about 4-4.5 in tall. The water stays quite cool too not sure what the exact temp is but it definitely starts to warm up towards the end of each week. I'll start checking the temps and trying to keep them in check though. Thanks