findings based on pics:
-water is clear and not in a state of distress.
-the tank shows enough surface area and dilution, including that HOB filter inlet and its eventual surface area, to match any decent presentation in reefing. you aren't extremely low surface area, for example
-you aren't compounding bioloads + nine big fish, most do. that means your current surface area is worked very little by the lobster and much by its feed, but you're within surface area ratios of all reefs and all reefs can take some feeding errors without loss.
-I only could find three heh
if someone dumps half a feed container by accident thats removable and can be detected without any ammonia kit, its visual. barring any physical errors, common daily feeds and the occasional minor blast is just what we all do. you can cease testing for ammonia and nitrite in this tank as long as it stays wet, even if you add some fish. there's plenty of shock absorber room here-no tipping point is approached.
before paying money for test kits for alk, pH, calcium, mg search out test kit comparison threads for the particular brands you may consider. if those posts show constant stated misreads, or disagreeing test levels off the same water sample per brands in that thread, don't buy those brands or types of kits.
be searching among digital kits for items you want to measure, and if those are cost prohibitive, forego the measure then- dont feel pressured to buy simply one step up kits from where you're at and feel they're accurate.
all you can do anyway for that lobster is provide cleaner than normal waters vs stagnant waters/ weekly preemptive water changes using clean verified safe water is pretty much it, and keep up good feeding. be exportive, willing to change water, vs relying on system to be in cruise control and that is best you can do in my opinion.
the way to manage this layout is simple weekly water changes, never a reaction to testing for waters that weekly water changes will always keep in fine balance here. its about preemptive small work efforts, and not any reaction runs to buy anything or make a new testing angle. if its not antlered in sps corals then you've got a mighty easy setup to run, temp ideals relative to the species of lobster will be the goal.
