[steve5reef]

Looking round for a new PH buffer, been using Seachem but its getting a bit pricey.

[ben]

what ph are you getting without adding buffer? usually its better to have it low and stable rather than keep trying to buffer it up

[Andrew]

Have you looked at your system to see what could be causing your low ph, sometimes it can be a simple fix such at poor gas exchange at the surface. This can be rectified by pointing a powerhead towards the tanks surface untill you get better surface agitation!

[steve5reef]

I never let it drop below 7.9, I usually buffer before it gets to 8,00 usually about 2 table spoons a week. The tank a Trigon 350 has been established for about 3 years,the system holds 100 gallons including the sump and is mixed coral softs, sps and lps it has 4 large fish emperor angle yellow sailfin tang maroon clown and a coral beauty. I've got to the stage where I need a calcium reactor which is in the garage waiting to go in, cant get calcium over 400 anymore, that may cause ph problems in it self. This is why I asked the question, I've just paid £12.74 for 500g seachem buffer and it doesn't go that far. Im going to try cutting down the amount I put in because it should only push the ph up to around 8.3 however much you use.
Cheers