My idea on automatic water change...

KingSpaded

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Ive been out of the game for that past 15 years and now setting up a new 180 gal reef tank. This idea is prob something some people do but i have searched and cant find this idea anywhere. been planning for the past 6 month and finally got the tank put together, stand build, 75 gallon sump, plumbing done.. and finally last weekend water tested everything and we are good to go.

Ive been planning on how i am gonna run ATO and drains for water changes and came across using DOS to do water changes. Pulling water out and replacing at same time in my eyes works ok but you will also be pulling out "new" water you just put in. so my plan please correct me if im wrong as I havent tested this yet.

If you run a line off your manifold with a solenoid and slow flow (100 GPH) fill a 20gallon tank and have an overflow that flows into your sump. Now lets say you close that solenoid. That 20 gallon tank is no longer getting any flow and doesnt effect sump operations or water levels. Now you can have a pump drain that 20 gallons using float switches, optic sensors or even with a manual valve. after you have removed old water you can refill that tank with fresh 20 gallons back to same water level and open solenoid and resume operation with a fresh 20 gallons in that mix.

Im new to reefing scene so im guessing this has been done many times ive just drive alot for work and get alot of me time to think about random things. let me know what you guys thinks. thanks.
 
if you use solenoid then that means 20 gal bucket is being filled on que using controller etc. which mean that that water is being pulled from the system and as this happens ATO will kick on and try to fill 20 gal of rodi water in your tank.
the only way this is possible is to have the 20 gal hard plumbed into the system so its a constant flow through it and then you can close it with a solenoid and cut it off, drain it, replace it will new water and open solenoid again without ever letting ATO kick on.
 
the solenoid will always be open during normal operation so the 20 gallon will always have water flowing through it. you closed solenoid to stop flow to 20 gallons so you can remove that 20 gallons without it being in that system.
 

IF YOU HAD TO TAKE A REEFING EXAM, WOULD YOU PASS?

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  • Not yet, but I have one that I want to buy in mind!

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  • No.

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