I use a pH 6.5 buffer solution, simply because I don`t know how rapidly the pH would change. I appreciate that pH isn`t as significant as people think, but a virtually instantaneous change may well harm my fish. I am just hedging my bets a little.
CO2 Supplier: Oxford Welding Supplies.
Location: Freeland Gardens, Wroslyn Road, freeland, Witney, Oxfordshire, OX29 8AQ. Tel: 0199 3882832.
Service: Â£59 for an 83cm pub cylinder and Â£30 to refill it.
CO2 Supplier: Ocean Commotion.
Location: 210 Clarendon Park Road, Leicester. Tel: 0116 2448382.
Service: Â£16 for 2kg of CO2. There is a one week turn round for a refill, operating from Tuesday - Tuesday.
CO2 Supplier: Maidenhead Aquatics.
Location: Wyevale Garden Centre, Postland Road, Crowland, Peterborough PE6 0JB. Tel: 01733 211956.
Service: Â£10 - Â£15 to refill a 500g JBL cylinder. Phone ahead to make sure they have a cylinder to swap.
CO2 Supplier: Bryland Fire Protection ltd.
Location: Unit 3, Peartree Lane, Dudley, W. Midlands, DY2 0QY. tel. 01384 573301.
Service: They charge Â£25 for a full 3kg cylinder and Â£30 for a full 5kg cylinder. A 3kg refill costs Â£5.20.