Morning everyone. John here from the NE Kent coast of England. Good to be part of the Plec community. Been a keen on acquiring some exotic plecs for a while but decided to hold back until I had a big enough tank. Well I'm there now and have everything pretty much in place. Would love a Starlight Pleco but before I take the plunge - some advice on PH - how can I lower it gradually to 7 and keep it there. Tried one or two alder cones but it won't budge far from 8 which is what its like out of the tap. I have one old common plec already and he seems OK but the Starlights need watera lot lower than present. Local aquarists keep giving me conflicting advice! thank you