Frequent Asked Questions | D-D The Aquarium Solution

Hi I had just ordered a custom tank and its 510litres in main 
tank and 100litres in sump I'm after a good bio pellet reactor I see that you 
have a reactor that has a pump with it would this one be able to cope with 
the size of my aquarium many thanks Leigh

I will be getting a 3x2x2 clearseal marine tank and want to use either a 
hydra 52 or 2 hydra 26. It would be a closed top marine tank as we wouldn't 
want the light bounce on the roof of the living room that comes with an open 
top marine tank. This would. Mean the led unit would be mounted to the lid 
which would mean that the unit will be 6 inches from the water. Would one 
hydra 52 provide sufficient light without dark spots if lid mounted or would 
2 lid mounted hydra 26 be a better option to provide sufficient light without 
dark spots


Hi I have recently set up a crystal red shrimp tank with some 
plants in it. I notice there might be some algae on the sponge of my hang on 
filter (i also have an eheim cannister running as well). I want to know 
whether is there a side effect on using rowaphos especially towards the very 
sensitive shrimps? ph/gh/kh/tds fluctuation?


Been battling with my phosphates recently. Tanks been up since last xmas, and 
its a 250 litre. Added a fluid reactor a few weeks ago with rowaphos. I've 
been stuck at 0.08 phos for weeks.

I was told to reduce flow so just a trickle is coming out of my reactor. So 
did this and waited a week.

Tested my water this morning. Both tank and fluid reactor output. I'm now 
getting what appears to me to be a clear test tube. Not the yellow the 0 
colour on the test kit indicates, but from what I see clear.

Is this normal? Or should I be getting the yellowish colour the kit tells me 
I should get for 0??

Test was performed as follows :

Wash out tubes in RO
12ml tank water to tube A for colour comparison
6ml tank water to tube B for testing
Add drops from bottle A and swirl
Add drops from bottle B and swirl
Add remaining 6ml to tube B and swirl
Wait 6 mins.

I've been doing it this way to avoid contamination from the tube lid. As it 
always seems to give me higher results if I do it the way the instructions 
say to.


Hi Tony,

Hope you are well?
Hopefully you can help put my mind at ease on the topic of Phosphate and Rowaphos?

I have an Aqua One 195 tank with fish, Soft and LPS corals. I feed the fish a twice a day a mixture of flake/pellets/frozen and corals every 2-3 days on DD LPS powder, Salifert liquid and Fauna Marin pellets.

I've been running your Rowaphos and FM75 Reactor for atleast 2 months but I can't seem to get my levels below 0.075.

When I started using it my level was 0.15 so its reduced but not to below 0.03-0.05 where I'd like to be. I've been testing both the Reactor output and main tank water. Test kits are Elos High Resolution and Nyos. 

I started with 50ml of Rowaphos and kept replacing it every few days but then tried 75ml and then 100ml the last couple of times. I've never managed the output water to test anything below 0.075. I've seen your YouTube 'Simmering' video and tried various flow rates but to no avail.      

Could you suggest any ideas of how I can keep lowering my levels? Should I go back to replacing 50ml (or more?) on a regular basis until it drops and be patient?

I've had a few Acans start to recede recently and I'm a bit paranoid its Phosphate related? I also get a light dusting of algae on the glass every 3 days which needs cleaning.

Hope you can help on this?

Best Regards

Hi, I have some h20 pro formula salt.

What I would like to know is can I mix 25 litres and store it in the dark in 
a sealed container until i require it - 5 litres a week. (so i guess the 
longest some will be stored will be 4 - 5 weeks)
Stored with no heater or powerhead.

If this is ok, would i mix the my 25 litres with my powerhead, get the sg 
right then store it?
Or would i need to use heater whilst mixing aswell, get the sg right then 
store it??

I would then get the amount I require, aerate and heat it for 12 - 24 hours 
before i use it???

Please inform me if the above is correct or let me know how to do it for my 
above requirements.

Thanks a lot for your time


Good morning I took delivery of your DD freshwater co2 set on Friday 
purchased from charterhouse aquatics ,set the system up yesterday and appears 
to be working fine  my enquirey is the solenoid emits a loud buzzing noise 
and seams to run hot is this normal ?  Regards


I obtained this info from Deltec webpage.  I broke the tip off the air inlet adapter off my deltec MCE300 protein skimmer.  Can you assist with replacement?  I believe it is P/N 31115700 .





I have recently bought a second hand MCE 600. The Aquabee 
runs perfectly for about 2 minutes and then trips the switch in the consumer 
unit. It does this when in the protein skimmer and also when in a bucket of fresh 
water, with or without air input. There is no vibration and it doesn't seem 
to get hot. Any ideas please, I'm baffled?

Hi my mce300 protein skimmer suddenly stopped working as it should eg.not 
enough water going through as normal..I purchased a new pump and impeller 
needle wheel from you but it is still the same just wondered if you could 
help me diagnose the fault thank you

   I am sure you have had load of questions on this protein skimmer but i keep 
getting conflicting information, I have the old MCE600 protein skimmer, can i upgrade 
this to the turbo version? If so what parts do i need to change and how much 
are they and where can i get them in the UK. your help will be mush 

Kind regards mark

Hi guys

I'm torn between the mce 400 and mce 600 protein skimmer..

I have a 250ltr tank and it will be hanging on the rear or the tank,can you 
confirm the depth of the body once it's hanging on the tank to the back wall.
Am I correct in saying the mce 400 is 77mm (body depth only) and the mce 600 
80-90mm (body depth only).??

Also if I have the room is the 600 going to really offer me better 

Cheers shame

Your brand of UV has been highly recommended to me for my reef tank, to help 
against parasites and algae. I have approx. 360 litre reef aquarium, could 
you advise what size would best suit?
Sorry but im not quite sure from the read up in the description.

Many Thanks

Hi, I am looking at some new lights for a new tank, the tank 
will be 6' in length, 18" in width and 24" in height, I am fish only with 
live rock, and was considering two AI Hydra units, one mounted either side of 
the central brace in the tank, I believe the Hydra's are 80 degree optics, so 
will two of these be sufficient for a tank of this size?  Or would I be 
looking at adding another light at a later date maybe?  Also, ideally I don't 
want to ceiling mount the unit, so was looking at tank mount and rails, can 
you confirm which rail and mount I would need please, and how many inches 
above the top of the tank the light would sit using the tank mounts and 
rails?  The water line in the tank will be approx 3 inches lower than the top 
of the tank due to not using a traditional weir system, I am using an 
overflow system drilled into the back of the tank so this will give me a 
little extra space at the top of the tank which will allow for additional 
light spread, many thanks

Kindly i want to know how to keep rowaphos damp all the time. Cause I'm from  middle east, I always order pig quantity and after year or more become dry any ideas