intank chamber two media basket for waterbox 20

I have a waterbox 20 cube and I'm having some nutrient issues that weekly water changes aren't solving. I feed 1/4th of a frozen mysis cube per day and 1/4 teaspoon of reef roids per week, so the issue shouldn't be overfeeding. I do not have a skimmer, nutrient removing chemical media, or a...

Chamber 1 is new and was only used for a month. Chamber 2 I got with the tank, unsure of age, in good condition. Will clean prior to shipping. $70 for both includes shipping. $60 for local pickup in the Northern Virginia area.