Please post your Ca levels once you test, I'm curious what they are. I have a work function until late tonight and a busy weekend but, I'll try to review and respond as soon as possible.I can test my calcium tonight when I get home from work and let you know. I have a new to me Hanna Checker with new reagents, so we’ll see how that goes. Tonight is my weekly WC day. I typically do a 10% WC, but I’m thinking that I should increase the change to effectively cut the existing NO3 and the PO4. With that being said, maybe I should look at 40%-50%. I did just throw in a Tunze 9001 protein skimmer this week, so moving forward I should be able to cut out some of the accumulation of NO3 and PO4…in theory.
Speaking to the dosing for Alk, I’m kind of looking at the All For Reef product for dosing. I like the idea of dosing Kalk with my ATO, but I would be afraid of a potential failure.
On the water changes, I wouldn't increase too drastically. Maybe increase to a 20% change or just increase to two 10% changes a week.
I've not used All for Reef personally but, I've heard good things about it. I know @Reefing102 uses or used it at some point.
That makes sense on the RODI to just buy from the LFS for a system of your size. I'd just test it next time you buy some to be sure they don't have a bad batch of salt. When/if you decide to get an RODI unit please post and we can make some recommendations.So I can go ahead and test the saltwater I’m using, but for full disclosure I’m not currently making my own. I’m purchasing both RO/DI topoff and Saltwater from my LFS. I could go head and ask them what they are using. The unfortunate situation is that I don’t yet own a RO/DI and haven’t yet decided on the best setup at home to cater to the needs of a 24gal nanocube. It’s hard to justify the purchase at this time when the demand of RO and saltwater is relatively small due to the size of the 24gal nano.
3.) All that said, take things slow and try to address one issue at a time. I've said it a million times over the years, nothing good happens fast in this hobby. Focus on one thing at a time. In your case, IMO, I would focus on getting the nitrate and phosphate down to acceptable levels. Once those are in check, let's work on your alkalinity and pH.
Sounds like a good plan to me! I’m hoping that new skimmer shines on cutting DOC prior to NO3 and PO4 build up.