Aquatic Plant Forum banner

low Ph in newly setup tank

1684 Views 1 Reply 2 Participants Last post by  hornedtoad1
hi i have setup and new tank of 35 gallons specs are as below
Tank size: 30Wx14Dx18H (inches)

Light:T5, 55W x 2

Substrate: ADA Power Sand SPECIAL-M as base and ADA Aqua Soil-NEW AMAZONIA (multi type) 18 litre (tourmoilne BC, bacter 100, and Clear Super is sprayed ,while setting up the substrate)

canister filter( jebro local brand) :with ADA bio rio (2 litre), and NA carbon into it

Co2 pressurized tank and ada co2 checker

plants:Elatina Trianda , and Hemianthus callitrichoides as carpet plant, a piece wood which i guess ferns (may be java ferns i am not sure ) and spike moss attached on it, i bought it because it was looking nice at aquatic shop

currently i am injecting 1 bubble per sec C02 for 8-9 hours with lights on for the same period of time, alternative day 30 to 40 % water change, Adding ADA brighty k , 3 to 5 ml after each water change.

its been 10 days now and i have seen that ferns have turned weak and brownish ,and got some kind of black algae spots on it, there were few spots at the time i bought it, but now its more, spike moss are doing well, Hemianthus callitrichoides, is growing but all the new grown leaves are turning into yellow/ brown color
i just bought a digital ph tester, and found that ph is quite low and counted as 5.3, after changing the water 40% its u to 6.9 and within one hour its 6.2 and than once the lights are on and co2 start injecting , ph gets low to near about 5 , Co2 checker will still shows the there is less Co2 in the water as the solutions shows dark green and its doesn't changes even after few hours, so can some one help me to find the reason for my dying plants, and guide me to balance ph , and Co2 , my tap water counts to ph of 7.1, i have read some where that the new AMAZONIA ADA soil , lowers the Ph, if this is the case , how to settle my ph so i can introduce fishes ,where both plants and fishes live happily , i forget , my current water temperature is 30-31 Celsius
See less See more
1 - 2 of 2 Posts
it sounds like your water might be pretty soft; you might test the kh. if the kh is too low (below 3 or 4) the water wouldn't have enough mineral content for adequate buffering. injecting co2 would bring down the ph, as the co2 combines with water to make carbonic acid.
if you find your water is extra soft, you might try adding some crushed sea shells or oyster grit to the filter or the substrate to bring up the water hardness.
i haven't used ada aqua-soil, but if it is acidic, that would sure contribute to the problem. maybe the soil ph would be listed on the bag?
good luck with the aquarium, let us know how it's going.
here's a link with more info about raising water hardness--
1 - 2 of 2 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.