I've been using anodized Aluminum topped Swiftech blocks for years now, and never had any problems with them at all.
I've been offering anodized Aluminum topped Swiftech blocks at the store, and didn't hear a single complaint from any of my customers.
So is D-Tek Aluminum top any different? Absolutely NOT!
Forget about anodized aluminum tops, many companies are offering aluminum radiators (now search if they're even anodized or not ) , anodized aluminum HDD blocks, reservoirs etc.
Some customers are using full copper water blocks with aluminum radiators (like Swiftech 's Hayden radiator or Innovatek radiators) wihout even knowing it. Or with anodized aluminum reservoirs, hard drive water blocks etc.
Is aluminum top or copper better?
Guess it's a matter of preference.
I prefer anodized aluminum top. Aluminum top is lighter, and looks much better than copper in the long run because it doesn't get tarnished like copper does.
Like every other water cooling store we recommend mixing Zerex RSC or Redline WW with distilled water at a ratio of 5% Additive and 95% water, no matter if the block has a copper top or aluminum top.
just my 2 cents
Bruce