They have this on-line but its OOS at the mo. But noticed 3 or 4 on the shelf at my local store today (Llansamlet, Swansea).
The Planet pool starter set is suitable for all pool sizes, and contains everything you need to start off your swimming pool's water treatment. This chlorine free product effectively reduces algae whilst disinfecting your pool. Included in the set are products for pH adjustment, disinfection and algae prevention, as well as a pool tester and guidance leaflet.