Marine Pure Brick Falling Apart

[Cment]

I have a MP 8x8x4 brick cycling in a 5 gallon bucket for a new build Im about to complete. It has been cycling for 4 months and each week I add a little of Dr. Tims ammonia to it while once a month do a 100% WC. Well I go to add the ammonia today and see the MP brick is breaking down. Theres small and large particles floating around and the water is super cloudy. I do a 100% WC and notice the brick has begun to disintegrate for no apparent reason. It's in our spare room with a cover, heater and power head for circulation. Im debating if I should even add this to the new tank with all the controversy surrounding them...thoughts?

 

[Lonely reefer's]

Are you pointing power head directly to MP or flow is too strong
I placed mine in low flow area

 

[Cment]

Are you pointing power head directly to MP or flow is too strong
I placed mine in low flow area

Power head is pointed at the surface and is only rated for 50gph. The area that’s deteriorating is at the bottom...

 

[MonsterReef]

Pure block are very fragile when I get them in the store half the shipment is broke but they are great for bacteria groth

 

[Cment]

I should mention that I have been using these for the last 4 yrs and in that time have had 6 of these. This is the first to fall apart like I’m describing.