PLEASE NOTE: StopBloc is available to order and is subject to delivery times. You can order it by dropping into your nearest Straight Up Hydroponics shop. Alternatively, if you would like to mail order it, please add it to the basket. Your order will ship when all of the items are in stock. You are welcome to call us on 01322 273444 if you want to discuss any part of your order. While we endeavour to source items as quickly as we can, suppliers occasionally run out of stock. You can leave a number for us to call when your order is in, or you can call us if you would prefer.

StopBloc from Flairform is an additive that helps prevent blockages in irrigation tubing. It resists the formation of deposits in feed lines, sprayers, filters, pumps and drippers. Not only this, it will prevent build up of elements around the root zone, helping to stop lock out.

StopBloc is compatible with any nutrient regime as well as an substrate you may be using. For maximum results, Flairform recommend using it alongside Pythoff. Dose rate is 0.2ml per litre. Always give nutrients and additives a good shake before using. This will ensure all of the ingredients that may settle are back in the mix when pouring it out. Add each product to the nutrient tank one at a time, giving a good stir in between. Never mix concentrates together in neat form as they can react badly, causing clumping of some elements. This can cause malnutrition or ineffectiveness and is a waste of nutrient! We would always recommend following the manufacturer’s instructions for best results.

Alternatives to StopBloc

At Straight Up Hydroponics, we have a few other additives for stopping blockage in irrigation. You can find them on our website by clicking here!