What is the difference between the blue and black tubing? The main difference between the black and blue tubing is the amount of light that is allowed in by the tubing. The black tubing doesnt allow any light in. This prevents any algae growth from occurring. The blue tubing is semi-transparent and therefore some algae growth may occur. However, since it is semi-transparent, the grower is able to see inside of the tubing to check for clogs or sediment accumulation.Nutrients that are used for hydroponics can be used for soil crops.

I heard that you need to prepare rockwool before using it. What is involved? When Grodan is new it contains some residual lime from production. Rockwool should be soaked in pH 5.0 water for about 24 hours before use. This is done to dissolve the lime. The lime will make the pH value raise to 6.0. Immediately before use, flush the rockwool with your nutrient solution. When you flush, you also flush out the dissolved lime. From this point onwards rockwool does not change the pH in anyway.pH stands for Potential of Hydrogen and is the symbol for the hydrogen ion (H+) in liquids. pH has a range from 0 (acidic) -14 (alkaline), with 7 being neutral. For hydroponics we are aiming for a pH between 5.5 to 6.

What is the difference between the blue and black tubing? The main difference between the black and blue tubing is the amount of light that is allowed in by the tubing. The black tubing doesnt allow any light in.

I have gnats breeding in my grow media. Should I be concerned? Those little black critters are known as fungus gnats. The term refers to a large group of insects, most of which have not been extensively studied. They reproduce in moist, shaded areas in decaying organic matter like leaves and algae. The life cycle is about four weeks, with continuous reproduction when warm temperatures are maintained.

What size water pump do I need for a reservoir that hold x number of gallons? The size of your pump doesnt depend on the size of your reservoir; rather it depends on how far you need to pump your water and how much water you need to pump. You want to avoid overworking your pump, so in choosing the proper pump you will want to choose one with at least 20% more power than need. To find out your appropriate pump size you will need to determine how much water is necessary to fill your tray.The main difference between the black and blue tubing is the amount of light that is allowed in by the tubing.

Is it OK to leave my lights on 24 hours per day? We do not recommend running lights 24 hours under any circumstances. Your plants need a time to rest and grow. This is achieved during the dark period. Running your lights for 24 hour cycles may have a detrimental affect on your lighting system and your plants, not allowing them to develop properly. In addition, many plant species do most of their feeding during the night, especially when daytime temperatures are high or humidity levels are low. Back To TopAfter you harvest your crop you can wash the media to remove all the old roots and then sterilize with a 5% bleach and water mix (apply one cup of bleach for each five gallons of water. ) Some people dislike using bleach because it can leave a slight residue. Plants can handle a certain amount of chlorine, and so long as it is very diluted, they should be fine. Flush or soak the media with the bleach solution for at least half and hour (an hour is best.