Ebb flood & drain

[Stevef111]

Hello fellow growers, I am growing 4x4 flood table I am growing in rock whool cubes I am getting algae on the Cubes is there anything to stop this or a cover to buy?

 

[TorturedSoul]

Everything that I have ever read about that issue has been, variously:

• It's not really an issue, IOW, is basically harmless (although I suppose its presence on the surface of a constantly damp substrate might attract any fungus gnats you happen to be hosting).
• Adding H₂O₂ to your nutrient solution on a regular basis will discourage it AND provide a boost of oxygen, because it decomposes into H₂O and O₂.
• If it really concerns you, you can cover the tops of your cubes with some sort of homemade opaque plastic thing or other.

However, yes, there are commercially-available products for that. I know that Hydrofarm is one company that makes (or at least sells) them. Do a web-search for:

rockwool block covers

...and you'll get links to them at Amazon and many hydroponics / indoor gardening stores.

 

[BedroomFarmer]

They sell caps such as the floraflex cap and I'm sure there are others out there. Just look up rockwool cap or flora cap and you should get some hits, I dont think it's much of an issue but they do help to water more evenly

 

[Stevef111]

Ok perfect thank you everyone

 

[Rexer]

You can also use some panda film to make a cover on the cheap.

 

[Stevef111]

Perfect thank u