Brand New here -- John from Strathaven, southwest Scotland
tapwater here very soft 7.2pH NO2 = 0 NO3 = 0 2degKH 4degGH
QUESTION ......................... low KH in soft water - can you guide me further?
I have Z.danios, Glowlight and Xray tetras, pair dwarf gouramis, brochis splendens and corys trilin in 25 and 20 gallon tanks at 78deg each with ---
internal Fluval3 foam powerfilter, powerhead driven undergravel filter (with cupful of cockle shells in gravel), 2 x 25W lights
weekly hoover gravel with 4gallon water change; adding filter Bacteria Boost and Tetra "Easy Balance" (OK - lazy, lazy!)
fortnightly plant food
monthly rinse filter foams
Tanks are/have been stable for many years at 6.8 - 7.0 pH, NO2 = 0, NO3 = 0
3degKH --- but only measured recently
I recently aquascaped with many more plants - mostly A. Swords, and bogwood caves for the corys
and planned to buy a simple sera "CO2 Start" unit for the plants
fishy website Quotes
FWQ1 " water below 3KH is unstable "
FWQ2 " soft water....if planted must raise KH to 3-6deg "
FWQ3 " my KH=1, pH6.6.........so cannot use CO2 "
Question 1............ with my low buffering, will the extra CO2 released by many plants cause a pH crash - read on....
FWQ4 " 1tsp baking soda raises 13galls by 4degKH "
some FAQ pages from a fish web years ago state - 1/2tsp per 100L raises KH by 1dH "
Ok .....armed with info.......I bought baking soda - BUT very wary of just chucking into my tanks, a couple of "home-brew" experiments
TEST 1 -- to raise KH
2gallons tapwater pH7.2 2degKh
added 1ml baking soda pH7.2 6degKh
added another 1ml pH7.4 11degKH ........... so it appears to work
TEST 2 --- effect of acid on pH ---- from nitrification and CO2?
the aforementioned website said to use hydrochloric acid (yeah - right) so used vinegar (acetic acid?)
sample 1000ml from tank pH7.4 3degKH
added 1drop (yes only 1!) pH6.8
added second pH6.4
added third pH 6.2 or below
Question2.......... Does this mean I have NO buffering and the pH can crash at ANY time?
Question 3......... should I add 1ml soda to my weekly changes and so gradually increase KH?
Question 4......... adding soda will raise pH - maybe this will be balanced by CO2 from plants
Question 5......... should I stay away from adding a CO2 generator?
well............all probably very basic but I'd like prevent any pH problems
many thanks for your time
best regards, John
after using TetraAqua "AquaSafe" de-chlorinator my tanks dropped by 0.5pH
A VERY helpful contact = Dave Hulse B.Sc. (Hons), M.Sc. Tetra Club Help Desk http://www.tetra-fish.co.uk/
advised their product was "slightly acidic" and to be vigilant when using it below 2degKH
John in LanarkshireMember Since 22 Jul 2006
Offline Last Active Aug 03 2006 05:56 AM
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