Instructions and Guidelines
Basic: Shake product well before using. Add product at the maximum rate of 5 ml (1 capful) per 30 US-gallons daily until the desired alkalinity is attained, then dose daily or weekly as needed (see below) to maintain alkalinity between 7 - 12 dKH. When used in this fashion, 250 ml treats up to 1,500 US-gallons (5,678 L).
Advanced: Determine the alkalinity in the aquarium using an accurate test kit before supplementing. Shake product well before using. Each ml of Brightwell Aquatics Alkalin8.3 will increase the alkalinity in 1 US-gallon (3.785 L) of water by 3.1 dKH (1.1 meq/L). If the initial alkalinity in the aquarium is below 7 dKH (2.5 meq/L), add this product at the maximum rate of 5 ml per 10 US-gallons daily until the desired alkalinity is attained, then dose daily or weekly as needed (see below). For minor adjustments to alkalinity, add 5 ml (1 tsp) of Alkalin8.3 per 30 US-gallons of aquarium water as needed to maintain the alkalinity within the proper range. Always try to maintain the alkalinity within a range of +/-1 dKH. To determine the rate of alkalinity depletion once the desired alkalinity has been acquired, measure the alkalinity at the same time each day over a one- to two-week period. To determine the daily dosing rate (preferable to weekly dosing) for alkalinity maintenance: estimate the volume of water in the entire aquarium system; divide the daily decrease in alkalinity by 3.1 (when measuring alkalinity by dKH; divide by 1.1 when measuring by meq/L); multiply this number by the volume of water in the system to get the daily dosage required (ml) to maintain a stable alkalinity. Daily dosing maintains a more stable alkalinity and pH (and a more natural environment) than dosing weekly, in which the alkalinity spikes just after dosing and then gradually decreases throughout the course of the week.
Note: If pH does not reach desired level when using this product as directed, such as when gas exchange in the aquarium is insufficient, addition of a pH-increasing product (i.e. Brightwell Aquatics pH+) may be required. Follow manufacturer’s directions for using such a product regardless of which one is used.
Caution: Contains carbonate and bicarbonate salts; harmful if swallowed. If swallowed: give water, get medical attention. May cause eye or skin irritation. If in eyes, flush with water for 15 minutes, get medical attention. If on skin, wash thoroughly with water. Keep out of reach of children. Not for human consumption.