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- May 17, 2020
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So after having yet another run in with the IM MiniMax Reactor (Midsize) I thought I might be in a good mood do do a review.
Currently I'm using BRS Premium ROX 0.8 carbon, running the pump on the lowest flow setting and the reactor tube turned to the lowest flow setting. I initially set it up as shown in the IM video with two sponges on top and two on the bottom.
Pros:
1) It fits in the second chamber with room left for the heater
2) It's easy to fill and change the media with the fixed outer tube that stays in the tank and a removable inner tube.
3) It frees up the media caddy for things other than carbon or GFO, or even lets you get rid of the caddy all together if you'd rather use socks, or even drop a Tunze skimmer in the first chamber, or who knows?
Cons:
1) Difficult to make flow adjustments to the pump once it's in place (you need to pull everything out, and then the pump is suction cupped to the bottom of the chamber so even when you pull the reactor out the pump stays behind.
2) Floating sponges! The sponges do not fit snug, so they end up floating to the top of the reactor chamber, potentially allowing carbon to tumble or even escape the reactor.
3) The pump is loud! 90gph pump and it's the loudest thing in the tank. Annoying vibration no matter how I try to position it.
4) Water noise! It's only because of the first of two mods that I made that I could even hear the noisy pump over the noisy water. The reactor sits far enough above the water level in the chamber that you can hear water running from the holes in the top of the inner chamber down to the water level into the outer chamber. Splish splash splosh.
So as you can see, more cons than pros. Really to the point where I'd have a hard time recommending this reactor as is.
Fortunately there are work arounds to some of the issues!
Mods:
1) Water noise fix - This was the first thing that I really had to fix. Maybe it's not as bad with higher flow media, but the constant trickling with the carbon was a no go. Solution: I took one of the sponge pre-filters from my eFlux wave pumps and slid it over the inner reactor tube. Fit like a glove! Still allowed the tube to easily fit into the outer tube, and the sponge is course enough that it didn't restrict water flow, yet it completely eliminated the water sound! I can live with this solution. It also gives extra insurance against escaping carbon that might come from the floating sponge issue.
2) Floating sponges fix - Fortunately the ROX 0.8 carbon seems to be heavy enough to not go shooting out of the reactor at low flow settings but this still needed to be solved. First I tried doubling up on the sponges as some users suggested. Didn't work. Now I had 4 floating sponges. What I really needed was a brace, so I took a length of RO tubing that I had laying around, cut it to fit between the lid of the reactor tube and the sponges, and voila, no more floating sponges! I'm starting to think this thing wasn't designed for carbon. I'm looking into getting a proper brace made.
3) Pump noise fix - As I said, I didn't even know I had a pump noise problem until I fixed the water noise problem! This fix still remains to be seen. I ordered up a Sicce Micra pump as a replacement. I really would have preferred to find an externally adjustable DC pump so that could have also solved the adjustability issue, but if this pump is as quiet as reviews suggest, I'll be happy that I found something for around $20.
Conclusion:
While it's nice to have the option of a reactor that fits in the rear chamber of an AIO, I'm a little surprised by the number of issues I've run into using it for something so common as carbon. Maybe while running different media fewer issues might come come up. I am hoping with the mods I've made and the pump upgrade that I will find the performance to be worth the effort but only time will tell. Right now I'm tempted to go back to bags of carbon in the media caddy. Maybe I should save the reactor for some other job.
In the end, I still don't hate it. The pros are good pros! But I'd be lying if I said that I wasn't a bit disappointed and I'm glad I got it on sale.
Currently I'm using BRS Premium ROX 0.8 carbon, running the pump on the lowest flow setting and the reactor tube turned to the lowest flow setting. I initially set it up as shown in the IM video with two sponges on top and two on the bottom.
Pros:
1) It fits in the second chamber with room left for the heater
2) It's easy to fill and change the media with the fixed outer tube that stays in the tank and a removable inner tube.
3) It frees up the media caddy for things other than carbon or GFO, or even lets you get rid of the caddy all together if you'd rather use socks, or even drop a Tunze skimmer in the first chamber, or who knows?
Cons:
1) Difficult to make flow adjustments to the pump once it's in place (you need to pull everything out, and then the pump is suction cupped to the bottom of the chamber so even when you pull the reactor out the pump stays behind.
2) Floating sponges! The sponges do not fit snug, so they end up floating to the top of the reactor chamber, potentially allowing carbon to tumble or even escape the reactor.
3) The pump is loud! 90gph pump and it's the loudest thing in the tank. Annoying vibration no matter how I try to position it.
4) Water noise! It's only because of the first of two mods that I made that I could even hear the noisy pump over the noisy water. The reactor sits far enough above the water level in the chamber that you can hear water running from the holes in the top of the inner chamber down to the water level into the outer chamber. Splish splash splosh.
So as you can see, more cons than pros. Really to the point where I'd have a hard time recommending this reactor as is.
Fortunately there are work arounds to some of the issues!
Mods:
1) Water noise fix - This was the first thing that I really had to fix. Maybe it's not as bad with higher flow media, but the constant trickling with the carbon was a no go. Solution: I took one of the sponge pre-filters from my eFlux wave pumps and slid it over the inner reactor tube. Fit like a glove! Still allowed the tube to easily fit into the outer tube, and the sponge is course enough that it didn't restrict water flow, yet it completely eliminated the water sound! I can live with this solution. It also gives extra insurance against escaping carbon that might come from the floating sponge issue.
2) Floating sponges fix - Fortunately the ROX 0.8 carbon seems to be heavy enough to not go shooting out of the reactor at low flow settings but this still needed to be solved. First I tried doubling up on the sponges as some users suggested. Didn't work. Now I had 4 floating sponges. What I really needed was a brace, so I took a length of RO tubing that I had laying around, cut it to fit between the lid of the reactor tube and the sponges, and voila, no more floating sponges! I'm starting to think this thing wasn't designed for carbon. I'm looking into getting a proper brace made.
3) Pump noise fix - As I said, I didn't even know I had a pump noise problem until I fixed the water noise problem! This fix still remains to be seen. I ordered up a Sicce Micra pump as a replacement. I really would have preferred to find an externally adjustable DC pump so that could have also solved the adjustability issue, but if this pump is as quiet as reviews suggest, I'll be happy that I found something for around $20.
Conclusion:
While it's nice to have the option of a reactor that fits in the rear chamber of an AIO, I'm a little surprised by the number of issues I've run into using it for something so common as carbon. Maybe while running different media fewer issues might come come up. I am hoping with the mods I've made and the pump upgrade that I will find the performance to be worth the effort but only time will tell. Right now I'm tempted to go back to bags of carbon in the media caddy. Maybe I should save the reactor for some other job.
In the end, I still don't hate it. The pros are good pros! But I'd be lying if I said that I wasn't a bit disappointed and I'm glad I got it on sale.