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PH-BUFFER 6.5 pH value stabiliser

  • Stabilises the pH value
  • Fast results
  • Permanently stable

Freshwater aquarium
pH stabilisation
Fast & effective
Easy & safe

pH-Buffer 6.5 is a product especially developed to stabilise the pH value for all freshwater aquariums.

pH-Buffer 6.5 quickly, safely and permanently stabilises the pH value without effecting alkalinity (balance of bicarbonate, carbonate and hydroxide ions).

Use pH-Buffer 6.5 in combination with pH Increase to permanently increase and stabilise the pH value.

Dosage incl. dosage calculator

Your aquarium
(net volume of water in litres)

Every 48 hours 1x level dosage spoon to 100 L of water

Add one level dosage spoon to 100 litres of water every 48 hours until the pH value has stabilised.

Before adding the product to the aquarium, dissolve it in 250 ml of osmosis water.

FAQ Questions and answers

The pH value should be measured in the aquarium during the day, as it usually drops a little at night.

With our products MICROBE-LIFT pH-Increase or pH-Decrease you can raise or lower the pH value in the aquarium, depending on what is necessary in your aquarium. If you have reached a pH value or if there is a pH value that is close to the corresponding ideal value, use our MICROBE-LIFT pH buffer (8.2 for sea water and 6.5 or 8.5 for fresh water) to stabilize the value. Our MICROBE-LIFT pH buffer can also automatically compensate for minor deviations from the ideal value, e.g. B. at a pH value of 8.0 to the ideal value of 8.2 in saltwater aquariums.

Tips & Tricks
  • If the pH values continue to be low, check the CO2 supply from your calcium reactor to rule out too much free CO2 in the water.
  • Immediately remove rot in the form of dead organic matter.
  • Use pH Increase in combination with pH-Buffer 6.5 to permanently stabilise and increase the pH value
  • Check your water values regularly.



If the pH value in the aquarium is already close to the target value, e.g. at 6.3 (with a target value of 6.5), the corresponding buffer compensates for small deviations upwards and downwards. It then stabilises the value. 

However, if the pH value in the aquarium differs too much from the target value, e.g. at 5.5 (with a target value of 6.5), it must first be increased or decreased using pH Increase or pH Decrease and then stabilised with the pH Buffer.

Can be optimally combined with





PH-BUFFER 8.5 pH-stabiliser