Alright, I have a few different random questions, that instead of posting as separate threads, am going to just throw into here. Here it goes:
(1) Skimmer constantly overflowing after water change
My tank is the Red Sea Reefer G2 350 (72 gal display with an 18 gallon sump). I purchased what I believed was the best accompanying skimmer for the system, a Red Sea Reefer RSK300. After the initial install and some adjustments to the water level valve, the skimmer was working. The skim produced was very wet but a light tan color, and I never had any issues with overflows. I just cleaned it out and found more detritus stuck inside the neck which I also removed, so I know that it is doing its job. However, I just did a ~25 gal water change, and ever since then, the skimmer will just overflow almost instantly, even when the water level valve is turned all the way down. I know I didn't refill the tank with too much water, and I have even tightened the downflow valve so that the sump water level decreases, which it has. Despite this, the second I look away, the skimmer overflows, spraying water inside all the cabinet walls. I would be fine letting it overflow and just sort itself out if it didn't spray all over the walls, but I am worried about damage to the cabinet. What could be causing the sudden change in behavior? I added the skimmer when there was literally no organic matter in the tank and it didn't behave like this, so I am unsure what could be the cause of the issue now.
(2) Stocking List for My System
I currently have two small clowns and a skunk cleaner in the tank. I know I want to add coral at some point (basically as soon as possible, so around 6 months in, sticking to softies and LPS bc SPS seem like a bit more of a challenge), and I am looking for fish stocking suggestions. I originally found this link which seemed like it was a good place to start: https://www.saltwateraquariumblog.com/best-saltwater-fish-for-a-75-gallon-tank/ . After further research though, it seems like this list recommends a lot of large, active fish that would just clog up the tank. I was planning on adding a starry blenny as my next fish to the tank, but I know I want at least some kind of small tang and/or a one spot foxface. Based on LiveAquaria and the website I mentioned, at least one of these is doable, but it seems like a stretch to include both in the tank, especially if I want to also add a blenny. Here is what I am currently absolutely certain I want to get: goby/pistol shrimp pair, flame hawk, coral beauty, a smaller tang, some sort of wrasse, and obviously CUC. I am willing to take the risk with the coral beauty and flame hawk eating/attacking inverts or coral. I also want a sea star for sure. What sort of flexibility do I have to add larger, more active fish, and is adding more than 1-2 (especially utilitarian fish) a bad idea? I have attached a picture of my tank. I think it has a decent amount of open swimming space, especially in the middle, but I am more than happy to be proven wrong.
(3) Iodine dosing for skunk cleaner
Alright, last and easiest question. I currently only have one skunk cleaner in the tank. Do I need to dose iodine to help with molting? I am using Red Sea Coral Pro salt. Their labelling doesn't mention iodine anywhere, but I figure it's in there. Will 10% weekly water changes be enough to refill iodine to a sufficient level for the shrimp?
(1) Skimmer constantly overflowing after water change
My tank is the Red Sea Reefer G2 350 (72 gal display with an 18 gallon sump). I purchased what I believed was the best accompanying skimmer for the system, a Red Sea Reefer RSK300. After the initial install and some adjustments to the water level valve, the skimmer was working. The skim produced was very wet but a light tan color, and I never had any issues with overflows. I just cleaned it out and found more detritus stuck inside the neck which I also removed, so I know that it is doing its job. However, I just did a ~25 gal water change, and ever since then, the skimmer will just overflow almost instantly, even when the water level valve is turned all the way down. I know I didn't refill the tank with too much water, and I have even tightened the downflow valve so that the sump water level decreases, which it has. Despite this, the second I look away, the skimmer overflows, spraying water inside all the cabinet walls. I would be fine letting it overflow and just sort itself out if it didn't spray all over the walls, but I am worried about damage to the cabinet. What could be causing the sudden change in behavior? I added the skimmer when there was literally no organic matter in the tank and it didn't behave like this, so I am unsure what could be the cause of the issue now.
(2) Stocking List for My System
I currently have two small clowns and a skunk cleaner in the tank. I know I want to add coral at some point (basically as soon as possible, so around 6 months in, sticking to softies and LPS bc SPS seem like a bit more of a challenge), and I am looking for fish stocking suggestions. I originally found this link which seemed like it was a good place to start: https://www.saltwateraquariumblog.com/best-saltwater-fish-for-a-75-gallon-tank/ . After further research though, it seems like this list recommends a lot of large, active fish that would just clog up the tank. I was planning on adding a starry blenny as my next fish to the tank, but I know I want at least some kind of small tang and/or a one spot foxface. Based on LiveAquaria and the website I mentioned, at least one of these is doable, but it seems like a stretch to include both in the tank, especially if I want to also add a blenny. Here is what I am currently absolutely certain I want to get: goby/pistol shrimp pair, flame hawk, coral beauty, a smaller tang, some sort of wrasse, and obviously CUC. I am willing to take the risk with the coral beauty and flame hawk eating/attacking inverts or coral. I also want a sea star for sure. What sort of flexibility do I have to add larger, more active fish, and is adding more than 1-2 (especially utilitarian fish) a bad idea? I have attached a picture of my tank. I think it has a decent amount of open swimming space, especially in the middle, but I am more than happy to be proven wrong.
(3) Iodine dosing for skunk cleaner
Alright, last and easiest question. I currently only have one skunk cleaner in the tank. Do I need to dose iodine to help with molting? I am using Red Sea Coral Pro salt. Their labelling doesn't mention iodine anywhere, but I figure it's in there. Will 10% weekly water changes be enough to refill iodine to a sufficient level for the shrimp?