• HDPE containers, we also sell HDPE jugs.
• Glass containers
• DONT use acrylic containers, including but not limit to Neptune DDR – DŌS Dual Reservoir. The acrylic glue will melt in sodium hydroxide solution and leak all over the floor.

We recommend to use:

• LLDPE tubing (standard RO/DI tube)
• PharMed BPT tube
• Clear PVC tube (Neptune DOS dosing lines)
• Silicone tube will only last for 5-8 months before failing.

Using other material tubes for dosing sodium hydroxide based alkalinity solution (Part 1B) can resuilt in melting tube and contaminate the tank water.

Most of the time, the huge drop or increase is due to test kit margin of error. Popular test kits like: Hanna caldium checker, Salifert calcium/ magnesium checker, Neptune Trident, they are great test kit for you to monitor the trend.

But DO NOT adjust the calcium/magnesium dosage based on those test results. Always check alkalinity as most alkalinity test kit on the market are much more accurate than calcium checkers. For a reliable check of calcium and magnesium level, we recommend do ICP-OES or ICP-MS test every 3-4 months.

If you are still stressed out, let's do a sanity check:

For every 1 meq/L(2.8 dKH), coral consumes 20ppm calcium. For every 1 ppm calcium, coral uses 0.06 ppm magnesium.

So for 50ppm drop in calcium, alkalinity will need to drop 7dKH, and 3ppm magnesium. Please check your alkalinity and see if it drops 7dKH over the past few days while the calcium drop 50ppm.

Unfortunately no. The calcium/ magnesium concentrate level in NAF - 2 PART is specifically designed to acommodate coral's alkalinity consumption. You would need a LOT of Part 2 to rise the tank's calcium/ magnesium level if it is low. Which is not very cost efficient.

• Please check if the salt you are using has a low level of calcium( < 400ppm) or magnesium (<1350).
• Use NAF - Calcium or NAF - Magnesium to rise the calcum/ magnesium to your ideal level.

We strongly recommend you always dose Part 1 and Part 2 together at 1 ml : 1 ml ratio( though 5-15 mins apart) because we design the 2 Part as a system to boost the coral growth.

• Only dosing Part 1 or Part 2 will result in imbalanced element ratio in tank which will ultimately cause coral health decline or even bleaching.
• Part 2 also plays a huge role in boosting coral growth. There is one customer told us that he was only dosing Part 1 because he has very high level of calcium and magnesium in tank due to dosing an all-in-one product previously. After a while, the calcium level went down to normal level so he started to dose Part 2 as well. Then he notice a much bigger consumption in alkalinity than before. It means the minor and organic salt version of trace elements also trigger the corals to grow faster.

We include a large amount of fluoride and a decent amount of idodide in our Part 1B. However, most of the salt on the market is deficient in fluoride, manganese and magnesium (those are very expensive salt) so it is very difficult to use NAF 2 Part to rise the fluoride level in the entire tank back to ideal level if the salt you use is difficient in fluoride. For rising fluoride level, we recommend you to dose NAF - Fluoride in addition. For iodide leve, use NAF - Iodide.

The white paste is mostly likely calcium hydroxide and magnesium hydroxide precipitation caused by a sudden high spike in local pH and alkalinity when the caustic sodium hydroxide (Part 1) hits the tank water. This might cause a slow drop in alkalinity even though you keep increasing the dosage because the alkalinity precipitates out of the water.

Why does it form? When the water flow is low, it is much easier to form magnesium hydroxide precipitation. High water flow will help to dissipate the Part 1 solution effectively into the tank water. Please dose Part 1 into high flow area in the sump or use a small power head to help the Part 1 solution dissipate into the water quickly.