Reef has been up and running for about 10 months, and a couple of months ago I started to dose (LPS / Softie tank right now) - primarily ALK, and a tiny bit of Ca / Mg to keep everything stable
I worked out that my ALK was dropping by 0.1 dkh / day, and have been dosing appropriately. All wonderful so far.
ALK has been stable in the 8.9 to 9.1 range (Some of you may be horrified that its not 100% stable, but for me - a noob - I feel like I'm getting there) for several weeks now
Standard 10% weekly water change (Aquarium Systems Reef Crystals - which I've been using since day 1) yesterday, and my ALK has suddenly spiked to 10 (Previous water changes didn't cause any spikes).
I didn't believe my Hanna checker so checked it twice, and confirmed with Aquarium systems test kit - its definitely 10...
Salinity was - and still is 1.025 - so its not like I added way too much salt or anything obvious...
Any ideas what could have gone wrong / if I should worry / what - if anything - I should do, or do I just wait and watch it slide down again over the coming few days?
All thoughts welcome - thanks for helping out a concerned relatively new reefer !
I worked out that my ALK was dropping by 0.1 dkh / day, and have been dosing appropriately. All wonderful so far.
ALK has been stable in the 8.9 to 9.1 range (Some of you may be horrified that its not 100% stable, but for me - a noob - I feel like I'm getting there) for several weeks now
Standard 10% weekly water change (Aquarium Systems Reef Crystals - which I've been using since day 1) yesterday, and my ALK has suddenly spiked to 10 (Previous water changes didn't cause any spikes).
I didn't believe my Hanna checker so checked it twice, and confirmed with Aquarium systems test kit - its definitely 10...
Salinity was - and still is 1.025 - so its not like I added way too much salt or anything obvious...
Any ideas what could have gone wrong / if I should worry / what - if anything - I should do, or do I just wait and watch it slide down again over the coming few days?
All thoughts welcome - thanks for helping out a concerned relatively new reefer !