PM Nuke PHN 
Written By Sy on Mon 5th Oct 20, 20:06I always build my loops with good old plain distilled water with either a silver kill coil or like this time with biocide because couldn't fit a kill coil anywhere in distroplate. I've used before and recommend adding this if going the distilled water route.
Great Product to be used with Distilled Water 
Written By Josh on Mon 9th May 16, 23:40Good product, using this alongside plain distilled water works great and prevents buildup of junk inside loop.
If you use Plain Distilled Water this is a Must. 
Written By Tony on Sat 2nd Jan 16, 12:32As a old school fan of just using Pure distilled water in my personal loops this is a must to prevent **** growing inside your loop especially if you are using UV Tubing.
https://www.watercoolinguk.co.uk/p/Liquidcool-Nuke-PHN-Concentrated-Biocide-10ml_20884.html20884Liquid.cool Nuke PHN Concentrated Biocide - 10mlhttps://images.watercoolinguk.co.uk/images/product_images/main/178/liquidcool-pm-nuke-phn-concentrated-biocide-10ml-lc-liq002-20884-1.jpg3.59GBPInStockWater Cooling/Accessories/<strong><strong>Latest addition to the Liquid.cool range</strong><br /><br /><strong>Warning:</strong> </strong>This product contains Benzalkonium chloride. DO NOT INGEST! AVOID CONTACT WITH EYES AND SKIN! KEEP OUT OF REACH OF CHILDREN AND PETS!<strong> </strong>Liquid.coolstock_yes5
100+ Available
for Next Day DeliveryVia Express Shipping
Our order cut-off time is 2pm Monday - Friday, for delivery next
working day. If you order after 2PM on a Thursday and select express
shipping, your order will be delivered the following Monday.
100+ Available for CollectionFrom Our Manchester Trafford Park Collection point
Our order cut-off time for same day collection for immediately available items is 3pm Monday - Friday. We'll notify when your order is ready to collect.
Our collection point is located at:-
WatercoolingUK, Unit 8,
First Avenue, Trafford Park,
Manchester, M17 1JZ