dandelion76

Hi reefer i need a Rio 20HF impeller to replace my current one. Anyone of you letting go or have any lobang to find it? I rang up a few LFS who carry RIO pumps but not spare parts Please post or PM me your offer. Thanks in advance.

It's the normal PVC pipe used for plumbing. In Singapore it's white in color. Mine one is grey in color coz I got it from JB As for the slot, if you want to have a very nice look, u will need to use a milling machine (that's what I did). Alternatively, u can try to saw it and then glue the reducer on the saw pvc pipe, still work although it might not look as nice. Cheers.

Tunze is one of the very popular equipment used by reefers with SPS tank. Normally, Tunze is used in larger tanks as its flowrate is way way too powerful for a 2 feet tank. U will probably creating sand storm in ur tank; all ur corals will be blown away by the strong current generated. Unless u plan to keep sps, then u may consider Seio 820 or 1100, else u may only need a Seio 620 to generate sufficient current in ur tank. (I used only loc-lines attached to my return pipe to generate current in my 2x1.5x1 LPS & Softies tank, even so I need to direct most of the loclines output to the back of the rocks as my LPS don't like strong current.)

In the box the manufacturer enclosed a warning msg printed in RED paper... Pleae Start Pump in Water Only. Do Not Run Pump In Air. Bro Roidan also mentioned that some ppl in RC reported that their RIO pump caught fire... so to be on the safe side better not run it externally. My 2 cents.

Hi, I have just got a 2nd hand chiller from a very nice fellow reefer here. Am thinking of doing some cleaning before plugging the chiller into my current system. I know that there're many reefers use vinegar mixed water to clean their skimmer, can this method be used with chiller, by running the mixed water through its heat exchanger (coated copper, not titanium) with a small pump (~1500 l/h) too? If yes, what is the mixing ratio? Anyone done this before? Or are there any better way to clean the heat exchanger? Your valuable comments/advise/opinion is appreciated. Many thanks in advance.

No problem bro Shoelevy .. actually I never did any calculation before, just think that it's alright. Ur question actually spur me to check if my intuiation is right? So now that I know how much my tank s.g. is fluctuating.. time to get a bigger tank to reduced s.g. fluctuation

Opps.. left out some details: (why I can't modify my own post??) So u can cal. the change in salinity, assuming that u r having 100 litres of sea water in ur tank and r using a 20L reservoir, 3 litres of water evaporate from ur system, u top up the water by 4 litres each time, and 1 litre of salt water back siphoned into ur reservoir: Salinity of tank water after 3 litres of evaporation = ((1.024-1)*100/97)+1 = 1.0247 After top up: New salinity of tank water = (97*1.0247+4*1)/101 = 1.02372 New Salinity of Reservoir water = ((1x1.024)+(16x1))/17 = 1.0014 2nd top up, Reservoir s.g. = 1.0031 ; Tank s.g = 1.02378 3rd top up, Reservoir s.g. = 1.005 ; Tank s.g. = 1.02393 4th top up, Reservoir s.g. = 1.009 ; Tank s.g. = 1.02408 And 5th ..... time to refill ur reservoir So the salinity of the reservoir & ur tank water would not change too much.

Nope... as onli a little bit of water (<1 litre,can be tuned properly) is back siphoned to the reservoir... So u can cal. the change in salinity, assuming that u r using a 20L reservoir, top up the water by 4 litres each time, and 1 litre of salt water back siphoned into ur reservoir: New Salinity of Reservoir Water = ((1x1.024)+(16x1))/17 = 1.0014 So the salinity of the reservoir would not change too much.

Thanks bro weishun .. Someone did ask if there's any problem pasting oyama paper and submerge it in tank water. Well after more than 5 months there's no problem with the oyama paper at all.. now even got coraline algae grow on its surface liao..

Phew ... bro ur tank super nice Saw ur sump earlier in another post (think it generates lots of envy and commends)... now that I have seen ur tank it's even neater and nicer ... Gonna track ur thread and hopefully one day, I will have a similar tank as nice and as neat as yours.

Cool bro ... so finally your 2 feet cube is ready for corals huh.. show more photos ler ... As for me.. got a new plan liao... 2 feet cube here i come

Try this and see if u like the idea, it works for many of us http://www.sgreefclub.com/forum/index.php?...opic=12846&st=0

Completed view

Then get few Stailess Stell Cap Screw to mount the skimmer to the over-flow pipe body. U can loosen the screws and adjust ur tank water level by sliding the over-flow skimmer up and down.

Drill two/four holes on the reducer, tap it. To have a better look, use oyama paper to cover the skimmer.

Promised to post but waited till such long never done that Okay here's what I did with the over-flow skimmer (requested by a new reefer). Things I used: 1x 2" to 1.5" reducer 1x 2" PVC end cap 1x 2" PVC pipe 1. Saw the reducer as shown by the black line, then attached it to one of the skimmer's end. Cover the other end with end cap.

I made one exactly the same as mentioned. In fact there's trick to get it work as close as possible to the Tubby (well to me Tubby is still better as you can control the water level precisely, and it's dynamically replenishing ur evaporated water). Things u need: 1x Electronic timer 1x Small power head 1/2" PVC tubing 1x 1/2" ball valve 1x 20 litres pail (or jerry can) With the ball valve, u can control the amount of water to top-up ur system more easily by playing around with the top-up time and ball valve opening. The problem with this set up is the inability to attain a fix water level once water top-up is completed wrt timer setting. Over time ur sump water level might become either too high or too low. The TRICK: What I did was to actually connect the power head to a PVC tubing , in which the discharge opening of the PVC pipe is going straight down to the sump, just above the desired water level of the sump before evaporation. Then, adjust the top-up volume such that after topping up, the discharge opening of the PVC pipe is slightly submerge under the sump water. As the power head is turned off, back siphoning will took place; excess water will then back siphoned to ur reservoir, and viola the water level will be fixed at the desired level (of course don't try to top-up ur water by 10 litres and let it back siphon ~5 litres ... ur sg will then be reduced overtime, don't blame me if there's any casuaties hor ) Beware too, that ur water reservoir level needs to be at a level lower than that of ur sump ... else get ready for a flood

Just sharing my personal experience with power-trip (well actually the circulation pump was turned off). I experienced thrice of such scenarios.. return pump was turned off (and lights of course) twice due to loose power point connection. (some one must have touched it ) Another time was due to power trip when my tank over-flow, all for a duration ranging from 5~7 hours. Mr. Murphy visited me - not once but thrice!! I only lost one of my yuma rock in one of the incidents. No any harmful effect observed in the other two incidents. Of course I do not have sps, and my lps seems to be quite hardy (am I just being lucky?). As for fishes, personnally I don't think there's much problem unless u overstocked ur tank. Imagine if they can survive the shipment for so many hours while being packed in a small plastic bag with <500 ml of water, wouldn't they be able to survive in a tank of >100 litres (for a 3 foot tank) for a mere 3-4 hours rite? p/s: just my personal opinion, try at ur own risk... don't flame me if ur LS/corals die hor

Bro Roidan I got what u mean.. well after all it all boils down to performance & reliability vs. price... may be can buy 2-3 RIOS as backup or change one every year to markedly reduce the possibility of pump damage/failure since it's so cheap

Sorry I might be a little bit off topic.. What about Rio 32HF? Max H: 4.3 m, ~7000 l/h (can't recall accurately) of flowrate. 120W. Only $110+. Anyone has experience with this pump running in 4-5 feet tank? Looking at the impellar design I know this is a pretty good and efficient pump (I am a mech eng. so I know how important impellar design is to do with the pump's efficiency).

SOLD. Thanks for all interested parties for showing ur interest.

THANKS BRO!!

Sorry bro.. where's AA? Never been there.. me usually go to ML, RB, Aquamarine, n LCK only

Any nice crocea sighted in the central or west area? Me tempted to get one more clam ler..

This article at reefkeeping has a very elaborate explanation on how to identify clams. http://www.reefkeeping.com/issues/2002-07/jf/feature/