TDS METER

Hi guys just a quick question ive just bought a TDS meter and i was wondering if i can just top of resevoir instead of emptying it every week i currently use a 50 gallon res and i use about half of it every week thanks guys

bad idea fishman ,
girlz use nutes up at diff. speeds . you will never know how much of each nute is actually left in resovior at the end of the week . i suggest you dont mix up so much at 1 given time if your worried about pumping old stuff down the drain .
peace
your cuz
crispi

xcrispi thanks for the reply but here is my problem i have a 4x8 foot table flood and drain and i have to use a 50 gallon res. because it takes about 25 gallons to reach my rockwool and thats with hydrotron placed inside my flood and drain table so im at my witts end dunno what to do any ideas?

bummer ,
not a whole lotta options then . i buy G/H 3 pt. in 6 gal. jugs for about 110.00 a jug . very good deal if you buy in quanity .
peace
crispi

hey xcrispi yeah i buy in bulk too but when u start adding the addatives like some of the advanced nutrients it can get a little costly...but oh well ill just have to dump every week just to be safe thanks for the advice......peace bro

There is a topping off schedule with the 3 part GH nutes that many use and use it with other nutes, but I can't remember it all the way. It is something like this, you top off with half strength nutes untill you have added back the amount of the res, so in your case, you would top off enough times to equal the original 50 gallons and then refill the system. Some times this takes a couple weeks or more. What kind of nutes are you using??
Adieu

blue bear im using liquid life right now with some AN like carbo load and im using CAL MAG and others i cant recall at the top of my head right now.but yeah thats what i was thinking of doing since my res is half empty by the end of the week i could just fill it up and add half regular nutes and ill be good to go but other people here are saying not to cause u dont know how much of each nute is used so i dunno what to do ???peace bro

It is really a trial and arrore method especially when you are not using a nute where others have already been successful, but I know that one goal when growing is to make it as simple as possible with out losing out on productivity. If you know your plants you may experiement for a couple res changes and just listen to your plants IMO.
Adieu
PS, also the larger the res like in your case, the more room you have to make mistakes, but I know that mistakes are the last thing someone wants to make in their grow.

bluebear your right about the bigger the res the more room u have for erros so im going to try it and see what happens im starting afgani from seeds right now and it is a pretty hardy plant so we shall see